if you have a nice, neutral DIed guitar this sounds like a tubescreamer.... so if you have a good DI take and you wish you had DIed your tubescreamer? here ya go.... also ahs a stereo mode so you can do like a stereo chorus or wide synth patch with that 'green' honkin' dirt allover it. This guy really sounds right to me. But having 2 TS/SD1 type pedals floating around this doesn't get a lot of use. Still glad I have it though.