There was some good discussion on this topic in the Is It A Gimmick thread, which is obviously the wrong thread because clean power is not a gimmick.
I noticed that discussion on this stuff pops up in random threads, often when someone buys something (like @Earmuffs’ recent purchase) , which makes it hard for someone to find useful information on the topic, so I created a new thread: Power Discussion: Power cables, conditioners, regenerators, surge protectors, outlets, dedicated lines
I’ll PM Tyler to ask if he wouldn’t mind moving some of the useful posts there.