I've had about 6 months. I use to amplify a fretted electric bass through a Demeter preamp + VTBP201s effects or strip Millennia Origin (SST-1) alone, with speakers Accugroove El Whappo + Tri210L.
What I like most is the musicality, the available power, sound quality and overall product robustness (never managed to do clipper, or do a "twist"), and it is very quiet despite the low volume fans. The sound pressure is impressive (with linkage to speakers), the sound is clear, little or no blast (when there is this from a fact-element upstream of the amplification chain)
I had not really tried another model in this range before buying it, I have not owned a PA amplifier of this type / power / quality.
Value for money: I bought used (still packed in the carton!) Original price to the importer French (27/03/2006) 2400euros about.
Quality at a price, but this is largely justified! In any case the value for money is very good. The only regret I have is that the volume knobs are not detented recessed into the facade, so they can be damaged during transport without rack.
I can actually hear my bass through this amp, it's really the best amp I've ever had. Unfortunately, I can not give advice in terms of sound (its first use) but the previous owner had several and was very happy in this mode (it was his amp back, but since it has never had a problem with all other fP2600, it would have never used ...)
It's an investment that I would do for sure!