I really like this power supply. It can fit up to 10 pedals, but more importantly, you have the option of powering two pedals with 18V - very useful for those with Fulltone pedals like the OCD that can be powered with both 9v and 18v.
I rated it with 4 stars, not 5, because it is not completely silent, however, for a power supply that isn't isolated, the sound is very good quality in my opinion i.e. not much noticeable hum, and I've gigged with this at loud volumes.
It fits nicely onto a pedal board.
The only drawback is that it came with the European plug and not the three-pinned plug used in the UK so I need an adaptor. Luckily I had one so this is no big deal for me, just an extra thing for me to remember every time I go to jam with my band or play live.
I recommend this, it has made life very easy and I am very happy with how quiet it is.