I ordered this on Friday and somehow got the package over the weekend, I didn't even notice it until last night. I only had a couple of minutes to mess around with it, my impressions so far is that it is a copy of the Boss Bass Overdrive. The description says individual gain controls for high/low, but they really just seem like EQ to me. The overdrive itself is the same kind of fuzzy/buzzy sound the ODB-3 has. I won't have more time to mess around with it until later in the week, but its not bad for $20 if that's the sound you're after.