This thing is nasty, in the best way possible. Goes from distortion to fuzz to chaos. When the toggle is flipped, your amp sounds broken and it's just great for making noise. I have yet to figure out how to use it in a band setting, as it is a bit too intense, but it is loads of fun to play with.
Covers light to Velcro, to saturated fuzz. Chaos switch is a little over the top, but a fun added feature to the origninal model. Check this out if you love FUZZ.