I have owned the PurePower 2000 for years with absolutely no issues. I use infrared controlled dimming in the studio and had some noise issues until I installed the PurePower 2000. Since then my sound system is dead silent at any volume level. I power the entire studio two-channel system with the PurePower 2000 and find no issues with dynamic compression or any other unsavory issues. The battery back-up feature is fantastic for keeping the system energized during momentary power glitches, a common occurrence on my rural power grid. The battery back-up was never intended to operate a sound system in place of utility, only to keep electronics energized during power outages of short duration, particularly short interruptions. Otherwise, if an outage is lengthy, the battery back-up allows an owner to efficiently shut down the sound system rather than have the utility power abruptly dropped, then surged back on. Most important to me is to keep my Aurender N10, and other music servers I have owned, energized so that I do not have files corrupted with unintended power losses.
Beyond the peace of mind that back-up power offers me, the PurePower 2000 AC Regenerator does an excellent job of delivering clean AC to my sound system. I have directly compared the PurePower 2000 with a PS Audio Power Plant Premier using many different McIntosh amplifiers (MC275 MC352, MC452, MC601, and MC2301) in my studio system. In the case of the MC452 and MC601's in the system I felt the dynamic range was hindered slightly with the Power Plant Premier, where no such dynamic restrictions were present with the PurePower 2000. I feed it directly from a 20 amp dedicated outlet, so there is sufficient available voltage and current. The PurePower 2000 outperformed the PS Audio Power Plant Premier with the two high power McIntosh power amplifiers.
I have read the testimonies from people who had issues dealing with the principles of the company. It is a shame that the various incidents transpired in such an unsatisfactory manner. I had one email exchange with Damian Janzen to verify that my PurePower 2000 was authentic and not one of the counterfeit ones from Taiwan. His response was timely and reassured me that my unit was manufactured in their Canadian factory.
I have two other friends who own and power their sound systems with a PurePower 2000 AC Regenerator/Back-Up. We are all happy to own and use this power conditioner. Two of us recently installed fresh batteries in our power conditioners and the results brought the PurePower 2000 back to like new status. I have no plans to part with mine.