This is a guitar pedal but, man I love the sound clips that I've heard. It's the first distortion pedal I've heard that actually sounds like a heavy amp and not like a jar of angry, skinny bees. It may even work well for an all out crazy billy sheehan like distortion on bass too. I just wanted to start a thread about it and maybe get some reviews for bass or guitar. I may pick one up for my guitar rig anyway. Rivera's lighter overdrive pedals may work well for bass as well.