I upgraded my Furman power conditioner to the P10 about a year ago and while the difference wasn't dramatic, it was noticeable and positive. I'd say the biggest difference was "blacker blacks" to use a video analogy if that makes sense. It was if the music was emanating from a cleaner background. I do get some hum from the transformer inside it sometimes, and while I wish that wasn't there, it isn't very noticeable. I'm maxed out on outlets and power capacity of the thing, but I'm running 6 amps off of it (2x mid/high, 2x mid bass, 2x subs) plus many less power hungry components. I could use a P20, but I don't have the room in my rack. I recommend the PSA gear, though the trusty old Furman still works too (and is now moved to the 2nd system)