I play in a band that does early sixties music. We do Surf, some Chet Atkins, Rock n' Roll oldies, etc. Tremolo really adds to the ambiance, but some trem' pedals try to do too much. This one is simple, Speed, Depth and Waveform. The waveform control allows you to go from a fairly smooth, like the Fender Tweed bias varying trem, to a choppier trem, like the Blackface Fender optical trem. This gives you a great array of options, including the ability to blend characteristics of both.