i love this pedal, im sure there's probably some other overdrive out there that may top this, but for the price, it seems pretty tough to beat. im playing this pedal into a vox AC15. with the clean boost control it gives just the slightest hint of break up, but it gradually increases with the volume control. even without dialing in the gain knob, the volume control gives a good bit of boost. The gain knob can go from a smooth very light overdrive, to a pretty nice crunch, but dont expect to play metal with it just going into a clean amp. i play jazz, funk, blues, and experimental music and this pedal fits all of those genres quite well.