Fishman Resonator Pickup

Pickup features: Passive, small ring-shaped pickup that readily mounts to the resonator cone-to biscuit screw with NO MODIFICATION of the instrument whatsoever. No on-board controls or power source, to standard 1/4 phono jack.
Impedence or other specs:

Model of guitar or bass: Vintage National Duolian ( Steel resonator guitar)
Position: all positions
Pickup being replaced: n/a
Other pickups on guitar: n/a
Artists using this pickup: n/a
You musical style(s): Blues
Reason for pickup change: This was the first pickup for this Vintage 1931 Duolian: chosen for ease of installation and no need for modifications of the vintage instrument, and because Paul Beard highly recommended this as his favorite , new resonator pickup(he worked with Fishman to design this pickup.)

Perceived output level: Louder than most passive Acoustic pickups: Preamp thus is not mandatory but recommended.
Tone: The tone is Balanced, preserving the tone of the resonator: the bass is deep and pleasing, while the accuracy of the mids and highs was beyond my expectations. Highs are Crystal clear with no added distortion, minimal/negligible mud in the lows and mids, to my critical ear.
Sonic evaluation: '31 National Duolian with the Fishman mounted, very simply, using the single existing screw that attaches the biscuit to the resonator cone: wire out through the high E-side small F hole, no active electronics/ power/ EQ needed. I felt very comfortable doing the work myself. I have tried it through a variety of Blackface and tweed Fender tube amps, which I cannot seem to EQ quite to my satisfaction, but am presently using a 50 watt solid state Peavey bass amp, which I like alot with this pickup. I am sure an Acoustic Guitar amp would sound even better. I am using the LR Baggs ParAcoustic DI preamp (which I love) which allows great control of tone and eliminates feedback while maintaining clean signal.

For which styles and positions is this pickup (un)suitable: This is my slide/ blues/ fingerpicking instrument and this pickup is a perfect match for this style: Think Paul Rishell or Keb Mo tone, clean, with deep bottom end but clear, singing highs, nice balanced tone. None of that harsh, brassy upper mid I have heard with other acoustic pickups.

Comments: I would replace the pickup without hesitation.
My only dissatisfaction is with the entirely unresponsive customer service people at Fishman, who never responded to a string of emailed questions I had regarding their failure to pack a critically needed insulating washer with the pickup, and failure to include a long enough replacement screww for my application, Thankfully, Beardman Guitars, where I mail-ordered the pickup, were prompt and courteous in helping me.