I really enjoy using this pedal ON BASS, because I like auto wah on it. It's fairly good. On guitars, I really hate it, I'd prefer the "Cry Baby" one, for using on a guitar. The only problem I may take out of it is the noisy sound it does on the amplifier, so we need to be aware of the definitions we use on it so it doesn't do that sound that much. Plus, using a good amplifier can reduce the irritating sound it can make. But summing up: it's a fair pedal, the effect is good, pity the noise it does, tho we can correct it a little bit.
Little update: Today (12/09/2016) I have played bass and used this pedal and found out that the noise that my practice amplifier by Harley Benton does is the main of the reason why the pedal does mostly that sound I refered above. As I said, good definitions + good amplifier!