Just picked one of these up from some dude on CL for $90, and WOW. I am impressed. I compared it to my BBE Green Screamer and a friend's Maxon OD9 and Boss Blues Driver. It blew everything else out of the water. Stacks great with the Green Screamer driving it. The ONLY complaint I have is I wish there was a little more boost on the volume knob when the gain is low or off. However, I discovered that I really hate the Blues Driver. The gain and tone knobs have a really limited usable range and on higher settings the pedal just sounded like total ass. To me it sounded best set as a dirty boost, but I have other pedals that serve that function just as well, if not better. I really had a hard time understanding the hype around this pedal after playing it.