Zoom FP-1 Expression Pedal

Sounds pretty good, at first. See reliability.

I wouldn't trust this thing for anything. I had it for about 3 or 4 months and then suddenly it went haywire. Before, it sounded wonderfully. I really loved the wah with it. Then, one day, for no apparent reason, it started to skip around. You would push it slightly down, and it would suddenly be playing as if you had it all the way down. Continuing down, it would skip back to where it should be. It almost starts to sound like a double wah, but not enought that it was good.

Really not a good idea. If you want a wah or whammy pedal, I would recommend buying a separate one. That is what I'm trying to do.