Line 6 MM-4 Modulation Modeler

You definitley need the manual for this one. The controls have strange names and they apply to different parameters for each model. Line 6 does supply you with a sticker that explains the controls for each model that is small enough to stick to the face of the unit, this way, the basic instructions can be permanently attatched to the unit. Editing the patches was a breeze once I read the very fun and informative manual. Holding a footswitch down for 5 seconds saves it....just like programming stations on a car radio! You can save only 4 presets, which sucks a little considering the vast number of available effects. They should add 2 more. I purchased the Line 6 Expression Pedal and use it to sweep the controls of the patches.....VERY USEFUL. You have control over ALL of the settings with the Exp pedal, not just one. The Exp. pedal should come with/be built into the unit.

I use a 1979 100 Watt Marshall tube head through a Marshall 4x12 cab.
(The right side of my stereo signal comes out of a smaller Marshall combo) All 6 of my guitars are Schecters, mostly with mahogany bodies and USA Seymour Duncan humbuckers.
The MM-4 has some stunning models of classic, sought after pedals.
For chorus, I use the Tri Chorus model (based on the painfully rare Dytronics Tri Chorus)and it's beautiful. Thick, creamy, and shimmering with panty-wetting stereo chorus. The Jet Flanger model (based on the popular ADA Flanger from the 80's) sounds very airplane-enginey....nice, airy flanging that doesnt effect your pitch at all.
The Phaser of my choice is the Dual Phaser model (based on the legendary Mu-Tron Bi Phase). It's way better than the Boss Phaser or EHX Small Stone. For those who like the MXR Phase 90, the model on here is a dead-ringer...with extra controls! Other cool (and useable) models are the Rotary Drum/Horn (authentic-sounding Leslie), the Ring Modulator (when alien sounds are neccesary) A Panner, A Panned Phaser (based on the Ibanez Flying Pan!), respectful models of Fender (Opto) and Vox (Bias) tremolos, and a juicy Uni-Vibe model (Expression Pedal strongly reccommended) that would maybe fool Jimi Hendrix himself. Packing all these into one unit was an awesome idea.

Limited experience here, but Line 6's Customer Service seemed efficient, knowledgable and friendly the one time I contacted them. The unit is built to be durable, but be careful with the footswitches....the washers that hold them in place need to be tightened periodically and the knobs (though protected with deep cavities), are plastic. I have had this thing for almost 5 years and it's the cornerstone of my effects chain. No problems yet.

Overall, this thing is possibly the most useful in this series of multi FX boxes from Line 6. The unit delivers what it advertises on the box and the sounds are GREAT reproductions of the originals.
Some may think "There's no way that thing beats my vintage MXR Phase 90 or my vintage Boss Dimension Chorus"
Let me say that the models are not cheapo, poorly done patches.
90% of them sound dead on accurate. If you don't have the cash, patience or space to track down these original units, this thing comes very close. Hearing the effects in stereo truly drops jaws.

With 16 fucntions and 4 knobs to adjust the sound of each, this pedal takes a little while to get acquainted with. This is especially true when knobs do not serve the same function for each effect. The ebst thing to do is sit down with the manual and go through each one and begin with the presets they have for you. From there you can adjsut rate, depth, mixture levels, etc. The manual is actually really good. it gives you a picture of the effect pedal being modeled, and a very good starting point for getting that sound. The unit has 4 foot switches, and setting a sound with the knobs and then depressing a foot switch until its indicator light starts blinking saves the seeting to that switch.

I play an Ernie Ball Music Man JP 6 through a Mesa Boogie LoneStar 100/50 watt. The sound quality you get depends on the effect you are using. The Chorus effects (Dimension D, Boss CE-1 and Tri-Chorus) are all really nice. The flangers and phasers are pretty good. The Uni-vibe is good. The Pitch Vibrato is good. The different tremolos are just okay, and the Ring Modulator is worthless. With noly 4 presets and 16 options, you aren't going to get to use many unless you like to tweek a lot. But for what I use it for, Dimension D, Tri Chorus, MXR Flanger, and Uni-vibe, it is just what I need. I used the Dimension D with an AC Plus set for medium gain, and the sound was fantastic. Suprisingly, the pedla is exceptionally quiet when you are not playing. At one point I tohught it was a tone sucker, but now I think it was something else that was causing the drop in volume. Clearly this pedal is not a replacement for all of those effects. But for the price and the amount of effects, and the quality of them, it is a great deal.

So far so good. I have read plenty about the unreliability of Line 6 pedals, especially the 4 switch modeling ones. This pedal has been sturdy enough so far.

Haven't had to use them.

My main infleunces are Alex Lifeson, Eric Johnson, and Steve Howe. For the money this pedal is a great deal. I was looking for something that could do Chorus, Flanger, Phaser, and other things. What really attracted me was the Uni-vibe sound. Play that with the right amount of gain and it will rip your face off. The Chorus sounds are really nice, especially the Dimension D and Tri-Chorus. You can even get a really good Flanger and Jet Flanger sound as well. If it broke or was stolen, I would probably not replace it, but just because I would want the real things.

Why I bought it:

1 - It???s a multi-effect unit that had the ???Leslie sound??? that I wanted and would duplicate some of the other effects that I had in my ???other loop??? without having to buy 4+ more pedals to get them.
2 ??? It???s a STEREO unit (I run in STEREO) with an ???easy-to-setup??? design (a single jack for each of the left & right inputs, same for the left & right outputs) and an ???expression pedal???.

My ???switching unit??? is the Lehle D. Loop (which I???ll do another post about). It???s a TOTAL STEREO unit (unlike the ???BOSS LS-2??? which is a great switching pedal, but just not *STEREO*). So, incorporating this unit into ANY loop was really easy.

It???s pretty easy to start getting sounds right out of the box. The ???TWEAK & TWEEZ buttons are kind of ???goofy??? as the ???parameters??? they represent change with just about every ???effect??? you select. Having 20 effects to choose from makes it extremely hard to remember what each one does.
Another ???failing??? (in my opinion) is that some of the effects seem to be ???backwards???. By this I mean that when you use the EX-1 expression pedal with it, you expect ???heel = SLOW???, and ???toe = FAST??????like on the Leslie rotating speaker sounds (among others). It???s like trying to do the WAH sound with your pedal BACKWARDS???.it just isn???t ???right???! Another ???bug??? I???ve found, is that in some instances the ???incremental flow??? (wow???this is hard to describe) from ???heel-to-toe??? isn???t ???consistent???. EXAMPLE: One parameter (let???s use ???speed??? for an example and each number equals R.P.M.???s) will increase consistently from ???heel-to-toe??? in ???equally divided steps/increments??? like: (HEEL=0,1,2,3,4,5,6,7,8,9,10=TOE). The next effect will be like: (HEEL=0,1,2,4,8,16,32,64,128,256,512,1024???and, at this point, I???m only HALF-WAY from the HEEL to the TOE position. SO, at this point???.every ????? to 1/8??? *pedal movement* drives it insanely faster. This is impossible to keep ???a smooth transition??? when I sit in a chair, SO???you can just imagine how IMPOSSIBLE it would be if you were a ???MOVER??? when you jam! There are no adjustments for this.

Manual:

This is where I have seen an APPAULING DECLINE in ???manuals???. They???re either non-existent, or they are skimpy, multi-language, ???one-size-fits-all??? types that only highlight some features of the product in order to save a few pennies on printing, OR they are written by a ???tech??? that ASSUMES the end-user should, *by osmosis* absorb all the technical knowledge by simply *touching the pedal*!!!
In this ???manual???, there is too much focus on the ???history??? of each effect and not enough on its OPERATION or (and ESPECIALLY) the COMPLETE operation of this pedal!!!

Besides that, the ???manual??? is divided into 4 sections that deal with the other modelers???.hence, the ???one-size-fits-all??? statement. It can be quite confusing when you???re trying to figure out what they are talking about???.and then you realize that you are NOT in the MM-4 section anymore, but in the FM-4 or DL-4.

Sound Quality
I get a pretty decent sound with it on most settings???.but, I run in stereo. It gives me a ???surround-sound??? that can???t be achieved by running mono.
My axe is a ???Rock ???n Boker??? (Rickenbacker) 480 model with Seymour Duncan and Dimarzzio (spelling?) pickups (I didn???t care for the standard ???clean sound??????but LOVED the action!).
The amps I use are a custom-built ???Silver Hammer??? by Max Butler (Lansing, MI) which is fondly called ???Maxwell???s Silver Hammer??? and no two are the same. YOU have to take your axe to him and he helps you get the sound you???re looking for **on YOUR guitar**. I mic this and run it into the PedalPad (post distortion). Then, I use the BOSS OD-20 for the rest of my ???distortion sounds??? into a 400 watt Yamaha stereo amp with cab on each side of the stage with 4 12??? Celestian???s (SP?) in each. Since the BOSS OD-20 is a MODELER, I want to faithfully reproduce those sounds and the only way I???ve found to do that is to run those kinds of effects into a CLEAN AMP. I???ve also found it to quiet???at least the way *I* use it.

Reliability
I can???t really comment about this aspect of it???except that I can say it appears to be built well rather well. I HATE ???flimsy???, light-weight pedals. I don???t trust them and have found (from past experience) that the ???flimsy??? pedals have more problems. This thing has an ???odd-duck??? power supply (AC) and, since I can???t get to it at the moment, I???d have to guess that it is capable of nearly 2,000 mA. I use this PS explicitly for this unit. My ???DigiTech Whammy 4??? sucks-up about the same power and, if you run these types with anything other than a UPS unit (battery backup & surge protector)???you run the risk of power spikes, sags and surges???. These can cause many pedals to *change state* (OFF will go ON & ON will go OFF, etc.). I???ve found this to really affect MIDI controllers & MIDI-enabled units!

Customer Support
Major SUCKAGE! Besides the UNANSWERED, ???requested assistance??? that the ???AUTOMATED??? system told me WOULD be answered within 24-48 hours (but wasn???t)???I called a tech and had to wait 20 minutes to get DISCONNECTED and, after redialing???.waited another 25 minutes before I got a **HUMAN**. My question was: ???Since I got a custom-made PedalSnake for my system, the DC power connectors (BOSS type) fit perfectly???but the connectors for the *AC powered* ???Line 6 MM-4??? AND the ???DigiTech Whammy4??? would NOT connect and, according to BOSS, THEIR connector is ???2.1 mm???. I asked the Line 6 tech: ???What is the dimension of YOUR power supply plug/jack???? After about 20 minutes of SEARCHING???.he said that they had NO WAY of determining the size of either the jack OR the plug (so I could make an ???adapter???). END OF CONVERSATION. All I did was run-up my phone bill!!! I???m ???guessing??? about the size and had to order more parts than I need just to make sure some will fit.
My OTHER questions to Line 6 were:
- Can you store your settings for EVERY ???effect??? so you can just ???turn the dial to that ???effect??? and get the last sound you set it at???.REGARDLESS of where the controls are at the time???..instead of just being able to recall ONLY the *4* preset buttons?
- Am I able to assign control of ANY ???parameter??????in ANY effect??? to the EX-1 expression pedal (instead of the ???default??? setting).

???..they were never answered???at least to my satisfaction.

Overall Rating
With the extremely poor tech support and the even worse ???laughable tech manual???, I have to give this product a 6 out of 10. When you factor-in the price of $250 for the unit???.$50 for the ???not-as-tough-and-smooth-as-I-expected-it-to-be??? EX-1 expression pedal???.AND $20 for the power supply???.quite costly for what you get. Since I had to get the power supply and the EX-1 at 2 different places, I had to pay shipping at 2 places???.bringing the whole total to over $350. Sure???you get 1 set of batteries with it, but most users say they don???t last very long (especially if you leave it plugged-in)???.but, you **HAVE** to buy THEIR power supply in order to really use it in any sort of PROFESSIONAL pedalboard where you have to fully secure ALL pedals and cables.

Would I buy it again?

Only if it did what I was asking about in my ???unanswered questions???. My Boss OD-20 has 4 programmable presets and at least 20 different distortion models, too. But, I can take any of these models (say, the ???Muff???) and dial it in to where I like it, then move to another preset and dial that one in. In the future, when I turn it back to the ???Muff???, it???s EXACTLY where I had it before???no matter where the controls are set. BUT, as soon as I move any of the knobs, only THAT parameter will change to what I want???.NOT the others. When I come back to it again, the ???Muff??? will be at the ???altered??? setting now. None of the 4 ???storable presets??? will ever change until you hit the PROGRAM button so you can always tweak them ???for the moment??? without fear of losing those great settings you found in the first place.

Hey Folks: there are more than enough reviews of this particular product out there already, so I wanted to share one thing with you since the folks looking at this are probably those considering either a) buying and MM4, or b) getting rid of their MM4 because they're frustrated with it and wanna know if others had similar problems.

I was in the second category untl I heard that Keeley offers a mod service for them... I am not in the employ of or associated with Robert Keeley Effects in any way except for the fact that I had them mod my MM4, but I can't recommend this service enough to those who are unhappy with the sound of their unit. Keeley's mod really made a difference, even though his site claims this mod is subtle.

It's $100 bucks, but is very well spent-- especially considering what you'd spend in other gear if you ditched this one.

See reviews of this mod (okay, including mine... but I really feel strongly that this is an important thing for MM4 users to know about!) under the Keeley heading.

Once again, this is a comment about a mod for this pedal-- read the "ease of use" section if you're interested.

Don't know if the mod helps here....

I have previously posted two reviews on this product relative to dependability. I am on my third MM-4 now, and was convinced that it too was taking a dump. However - and this will possibly contradict one other post - I just discovered that the power supply which I have mounted inside my custom pedal board was delivering between 4 and 6 volts only. The MM-4 needs 9 to operate properly. I never thought to check it. And when I put in 4 "C" batteries, it worked perfectly. Power supplies can and will crap out, and mine did. I got a new one from Zzounds for $20 and everything is fine now. My apologies to LINE 6 for the previous product bashings (and the fact that their suggestion that I might have power supply issues fell on deaf ears - mine!). As for the other MM-4 user who claims he changed power supplies and still had problems...you must check the power supply output with a voltmeter to make sure it's 9 volts A/C or the thing isn't going to work properly.

I've found it fairly easy to use, but I love tinkering with effects; I would imagine those that don't, or want something they can quickly dial in will be put off by the sheer amount of options. The manual is helpful, especially if you have no intention of deviating from their recommendations; it's also a helpful starting point for finding your own sounds.

I use this with an American Standard Stratocaster and a 1964 Les Paul Special double cutaway, both stock, into a variety of effects (main setup is King Vox-Wah --> Vox Valvetone --> Sovtek Big Muff Pi --> MM4 --> DL4 --> MXR Smart Gate --> 1968 Fender Super Reverb). It's not noisy at all; if anything, it seems to drain some volume away (when I use this in combination with Line 6's DL4, there's a too-large-to-be-acceptable drop in volume).
NOTE: taking the time to read my rundown of all the effects may save you some spiritual headroom--imagine what a butt-chapper it's gonna be to get this thing home and realize it's rather limited in it's use:
The rotary drum effects sound so cheap you'd swear you'd spent the $270 trying to win the thing at a state fair. The tremolo effects are equally useless--I get much better from my Super Reverb's vibrato and my Boss TR-2.
I like the Phaser based on the MXR "script" Phase 90. I have a friend who has one of those, his brother has an original Maxon Phase-Tone that is even sweeter, but I prefer the MM4's for one reason: you can use the Tweez setting to turn that 4-stage MXR into a 16-stage phase-fest, and it will amaze and astound! The dual and panned phaser's are also great, but only in stereo usage; using them in mono just keeps them from doing what they do best. The Uni-Vibe actually sounds pretty good, sometimes even preferable to my Dunlop reissue, however, the "sometimes" is an important qualifier, as I've found it practically impossible to recreate sounds from previous practice, rehearsal, or recording sessions, even just from turning it on and off! The analog flanger is acceptable, but I prefer my vintage Deluxe ELectric Mistress. The Jet Flanger is great, especially at extreme settings (i.e., far removed from what is in the manual, and being pushed by a wall of distorion--sounds like an electric flamethrower). I'm not much of a chorus fan, although the analog chorus works well on bass. The pitch vibrato and ring modulator are fun toys, the panner sounds great at 4:29 am when you've just recorded a googly-eyed track and are listening back to it with headphones (note, however, that this is about the only time it sounds that great).

Problem comes in when trying to switch to another of the modulation effects, or switch the effect off and back on to the same settings, as a gigging musician might want to do, say, mid-song. It can't be done without resetting everything back to a ghastly swooshing sound (call it the "Katrina Effect"--with the right delay, it can have a haunting, stormy-weather sound). You could use a bypass pedal to alleviate the latter problem, but you shouldn't have to with a pedal like this (you can read about the various design flaws and recurrent problems from reviewers who explain electronics better than me, but here's a summary: the footswitches are on the motherboard). Suffice it to say, I've only tried gigging with it once, and I likely won't ever again because of the above problems, but also because the power supply is a fricken brick, and the cord too long to be anything but an annoyance, something else to try to get out of the way on a crowded stage or pedalboard (but still worth the $20 over buying truckloads of C cells--the batteries only last about 4 hours).

Never dealt with 'em.

In gigs I will use my Deluxe Electric Mistress, Uni-Vibe reissue, and/or Small Stone, and this is an important point other reviewers have mentioned: for the same amount of money (most places you're gonna pay the Guitar Center/Musician's Friend price of $250, plus $20 for the adapter) you could buy 2-3 pretty fine modulation effects that cover the spectrum. There are many good techs out there that perform pro-quality modifications for reasonable prices that can make an average Boss pedal get its groove on. I've noticed that Line 6 has gone to making smaller stomp box modelers with fewer options (a lot of the chaff taken out) that sell in the $100 range and look like a box you can stomp on; too bad they didn't model the legendary Boss toughness on the MM4.
I think this box's ultimate value is in the safety of a loving home studio. It works well on my guitar before and after other effects, gives a cool faux-synth sound to my bass guitar on the analog chorus, and I use it all the time on my DX7. If you have it or are getting one, try using the panner or pitch vibrato on a drum machine. I usually have it last in an effects chain, going stereo into my Mackie mixer.
If it were stolen or lost as part of a larger thievery that was recoupable by insurance, then yes, I would replace it.

you can get a sound quickly but thers alot of knobs to tweek/fine tune so your sound wont be the end result,also wtf does tweek and tweez mean?

this pedal does a Digital simulation of some great classic pedals.ive done an a-b against some of them i.e. the mxr phase 90 (script) ,mxr flanger (80,s) model and a voodoo lab univibe,and to be truthful it sounds fuckall like the real organic analogue stomp boxes,computerised effects imo,i hate to think what the preamp modeler sounds like with not a valve in sight.

it works ok but 4 massive fucking batteries is a piss take,its adds 1kg to the weight of the twat

never contacted as they would probably boil my piss after saying this was the answer to all your modulation effects

this pedal is good for computer geeks and there digital shitty tunes if your a real deal rocker, burn the fucker and by some old analogue boxes

This pedal was very easy to use out of the box.

Sounds great

These pedals are VERY unreliable. I bought mine brand new and it started to have problems by 6 months. If you look around there are many users with similar problems. During a gig I clicked the pedal on and all the lights would start flashing as if you powered the unit on, Then it would just go dead. It happend a few times and now the unit is won't power on at all...I used a voodoo labs powersupply, and when I first started havning problems I switched to batteries...no help. I have a few friends that have purchased the mm3 and the other modeler pedals. All of them have had similar problems

Line 6 doesn't seem to want to answer your questions as they have a full faq of useless questions and answers to sift through. When filling out their online form to ask a new question they hit you at everystep with "check out these related questions" which are never related to the questions being asked. I haved attempted this process twice with line 6 and I recieved an email from them once telling me to take the pedal to one of their authorized service centers. I checked it out and each company charges $60 per hour and 40 just to look at it. I think in the end of the day I would rather just buy a new pedal.

Even though I have had a bad experience with the reliablity of this item I would say in the event that I have recieved a defective unit I would try again and purchase another.

I reviewed this product in December of 2004. See above.....

If this is a repeat review, it is because I did not think my most recent one would be posted for all the profanity I used. I have calmed down and will try again...

I reviewed this product in December of 2004. Please scroll back up.....

This is the reason for my second review. My SECOND MM-4 lasted a year. The first lasted 6 months. Maybe my third will last 18 months? In the middle of the gig, the unit went into by-pass by itself (selected pre-set/effect light went out). I kept stomping on the switches - and they are not really switches at all, just momentary contacts - and the light would stay lit for about 3 seconds, then quit. At one point ALL 4 LIGHTS were coming on...by themselves. I use a power supply, not batteries, so that could not have been the problem. I was going to give the unit a burial at sea (chuck it into the nearby canal), but decided not to pollute....

I'm a working musician and I need my effects NOW. Send it back and wait how long? So...I guess I will eat yet another $280 and buy a third one. LINE 6 has some serious issues with reliability......

I'm a working musician, playing mostly classic rock for about 45 years now. All this info is in my previous post above (Dec. 2004). I think one of the biggest problems with this pedal is what LINE 6 uses for switches. They are momentary contact buttons that directly contact the PC board under the housing. This is a cheap way out as opposed to using mechanical switches like MXR uses. The actual switching is done electronically. There's nothing a user can fix on this thing. So, today, I'll go buy yet another because I have to have the effects it does. That'll bring the grand total up to $840 in 18 months which I will write off......

simply plug in and off you go. simple in and outs and once the Powersupply is plugged in you don't even have to press an On-Button. Simpleton!
Editing is straight forward and you will understand the unit within seconds.

Getting a good sound is a bit more complicated though and the manual should be close by.
Getting an exceptional sound does require a lot of patience. I will explain below.

It does a lot more than what I?m looking for in this pedal, which to replace my Electric Mistress Flanger, TC Electronic Phaser and Fulltone Tremolo to save space on my pedalboard. But I only would replace my trusted vintage pedals if an all-in-one unit can simulate those gems 100% perfectly ? not just ?okay?.

Playing around with it for the last few weeks, concentrating mainly on the above sounds and I must say the pedal is pretty impressive.

The Tremolo is spot on. No need/no tears for my old Fulltone Tremolo - which I considered the best pedal Tremolo I ever used.
The Line6 simulation gives me everything to fine tune the fluctuations into great detail. It's a bit scary thinking about it. And no digital end to the sound. I get a really warm, musical tremolo. Stunning.
The simulation I use is the "BIAS TREMOLO".
I must also say it might be hard work getting a great setting without having played a "classic" pedal or one to judge the Line6 against. The possibilities are endless and having a pedal/sound as a guide did help a lot.
The Tremolo gets a 10/10 from me.

Next I try the Flanger sound and here it gets a bit tricky. I swear by the EH Electric Mistress - I had the pedal for many years and I can dial in great sounds from classic to experimental in a second.
I fiddled endlessly on the MM4 and had to download the Manual in order to get me anywhere. I mean I dialled in some flanger sounds but they all sounded pretty useless.
With the manual I find a good setting as starting point and then it didn't take long before I had "my" flanger sound.
The sheer amount of fine tuning capabilities let me use the "Analogue Flanger" simulation as if I had the Electric Mistress right in front of me. All the nuances. Then some tweaking on the TWEEZ knob and I'm getting close to the slightly bass-y sound of my Ross Flanger. Again - it feels like having the Ross right down at my fingertips - only that I'm dialling on the MM4.
WOW! I'm seriously stunned. It does take patience and - again - I believe it does also take some working knowledge with the individual "originals" in order to get "spot-on" sounds rather than just some lame "okay" simulations. Hand to heart: I wouldn't have gotten anything really worth the pedals money out if I couldn?t have A/B tested the sounds between MM4 and my originals.
Without, it would have taken me days and days and I would have probably already sold the MM4 by then. Its possibilities are amazing but as we know - often too many options can lead nowhere while limitations can really make you focus.
The Flanger simulation gets an 8.5/10 - it will do every Flanger sound - no matter what weird pedal you currently use - but tweaking is laborious - and I'm sure it won't get much easier with time. Its knobs are just EXTREMELY sensitive. Basically a good thing.

Last comes the Phaser ... and by now I'm not surprised I got what I wanted. The Phaser isn't anywhere as GREAT as my TC Phaser, it doesn't do the long sweeps as stunning as my Solec pedal but the simulation gets me very close - an audience wouldn't hear the difference and I'm probably a bit too close to Phasers anyway - having had a mad number of Phasers over the years. And afterall - I only had the MM4 for 2 days - I very well haven't totally explored everything in that short time and maybe I will find the 100% sweet spot like I did with the Tremolo and Flanger.
The Phaser (btw, I use the "CLASSIC PHASER" simulation on the MM4) gets an 8/10 - but might be upgraded later.

Out of fun - and because I never played one before - I use the last preset button to try a Uni-Vibe simulation.
Very close sound but I need more time to discover how the effect really works. Which - again - brings me to the conclusion - in order to use this pedal effectively and to SIMULATE famous units - you do need some work experience with the originals to get quick results.
If you don't have those references - keep tweaking - don't sell it - I seriously can't believe how great this pedal is. So far all simulations have exceeded my needs/hopes. I'm not just talking basic sounds but even those details that came with the originals can be reproduced.
This is pretty faultless so far.

I'm not yet going to sell my original pedals but I got a feeling if this pedal turns out being as robust and roadsafe as my other pedals I wouldn't really know why I would need to waste space at home with those boxes (which I still adore - no question).

My personal overall rating on it is an unquestionable 10/10. I really think it's THE BIZ if you use 2 or more effects this pedal simulates. It will save you space and you won't miss your "classic" sounds at all. Looking down at an EH Electric Mistress or whatever vintage pedal - is far cooler to look at - but be serious - if it's sound you're after this is a 1:1.

10/10 for the MM4 - I just say it again.

Can't really comment on reliability - need to have it longer but there's no reason to doubt reliability and I wouldn't sweat taking it to gigs.

Not used it yet. Based on a friends experience I heard customer support is second-to-none.

I love my vintage pedals and won't sell them. But my pedalboard has simply grown too big and the MM4 will replace 3 pretty large pedals and it will make me save space.

The style I'm playing is sort of NewWave/PostPunk influenced (eg. early U2, Echo & The Bunnymen, Suede, Patti Smith, etc).
My main sund components are my Fender Stratocaster and Epiphone Riviera semi-acoustic going into amongst others MXR DynaComp, Boss SD1, Boss DF1, Electro Harmonix Big Muff, Electro Harmonix Deluxe Memory Man, Boss DD5 and then split into my Vox AC30TB and Roland JC120 amps.

All my gear is vinatge and the Line6 will be the only exception. I really only want to use the MM4 to simulate the same sounds I got from my original Electric Mistress, SupaTremolo and TC Phaser. And it does this perfectly. No digital end like many other reviewers had complaint about.
I assume it takes a bit of time getting used trusting this unit. As I said above - if you can A/B test vinatge pedal and MM4 and will take time fiddling around (the manual is a good starting point!) you will get the results. Don't let your eyes fool you. The MM4 will sound like your old boxes if you take your time. I'm totally convinced and if it gets stolen I'd look for a replacement straight away.

What I'd like to see in possible future updates are LEDs around the knobs to see the position better - maybe like those wicked LED knobs Behringer is using on its V-Amps. With that presets could be edited much quicker on stage.