If you are a guitar player you know what this is. Amp models are pretty good but the FX are much superior to Line 6 stuff with foot control over all FX including the best Leslie sound ever in a pedal. The speed is not just fast or slow but variable. The Tremolo is equally great as well as the Whammy, distortions, etc. This was the flagship of Digitech at the time. The foot controller is built like a tank and the pedal controls the wah wah models, volume or anything you assign it to. This unit was never taken out of my studio.