I have the fulldrive 2-its sweet because its like a two channel box-od on the left...boost on the right-it has sort of a plexi vibe to it, and like fulltone products, built like a tank and dependable-I use it with my boogies to get more of a classic rock sound/gives the boogs some added bite/sometimes I just use the boost to slam the sh&t out of the front end of the amp while its dialed in with a low/mid gain setting--just the right amount of dirt and response-some good voodoo :D