Quote Originally Posted by realysm42 View Post
Have you any experience of them?
Some - and associated plugs (my scepticism stretches to those too).

Personally, just I use Crabtree (though I have also used MK which are just as good) unswitched sockets wired with heavy gauge cable to the fuse box (when I moved into my current house there was, (somewhat bizarrely) an electric shower fitted in the room in which my hi-fi now resides - so, rather conveniently, the cable was already in place ).

In my previous house I had a similar mains layout and also had an earth arrangement like that described by Marco. I must admit, I am tempted to duplicate the earth in my current house (not instead of the house earth - as well as). The only issue is that my old listening room was on the ground floor and my current one is on the third floor.