I just bought one from a guy off craigslist and man, it screams. I intend to use it with a Korg Volca Bass synth I'm buying soon. I tried it on my guitar and there was this annoying noise, hard to describe, a high-pitched pulsing sound when not playing, from my amp, that seemed to subside when I turned off any distortion pedals and when I rolled off the high end. Might this be just that I shouldn't be using it with a guitar, only with bass. Might the higher frequencies be making it distort somehow? I couldn't resist trying it out on my guitar. I wish i could say i demo-ed it before buying but no, I'm guilty. Sight unseen. I hope I didn't waste my money. Maybe someone here can tell me yes or no.