Is the Cyberpower Pure Sine AC regenerator a good buy?

Hi All,

I've dived deep into Audiogon threads regarding power conditioning, and have come across a barand/model of AC regeneration that appears to be somewhat more cost effective than PS Audio offerings.  But are they effective?  i'm not sure.  Can an Cyberpower PFC Pure Sine Wave AC regernators chime-in an comment if the units made any audible improvement in your system?  Thanks!