Sound — 8
I use this with my Roland Cube 30 and a Ibanez RG320, and I get very good sound from this pedal. It is very versatile, you can get a wah sounds from Hendrix or Hammett, or anything else. There is no feedback except when I have all the knobs turned up with the boost on, but the pedal is only a foot and a half away from my amp and I think that may be what causes it.
Overall Impression — 10
For the music I play, which is primarily Metallica, this pedal is perfect. And when I want to play other styles like Hendrix or Guns N' Roses it will work great for those too. Overall, it is a very versatile Wah-Wah Pedal and very easy to use, and you can get great sound from it.