I used one for a week
it provided gains to reducing noise floor, amps sounded more powerful, blacks on TV were blacker and images more 3D.
Like a good power conditioner for the price.
The drawback is that it uses about 2 pounds of silicone caulk that STINKS
terribly.
Like a construction site, but worse. There was no amount of airing out (for a week outside) that was enough to keep it from not just being awful.
Sound very good, smell very bad.
Perhaps the worst smelling audio gear I have ever experienced (that did not contain rotting dead things, and then not sure still)