It's pretty devastating. The Niagara 1000 does better, but not really qualifies as "worth the money" according to Amir.
$5500 is a lot of dough to raise the noise floor.
PS Audio PowerPlant 12 Review (AC Regenerator)
This is interesting. The testing concludes that the filtering inside of the actual electronics device is what matters and that this PS Audio product actually adds its own noise. Some irony.