The thing is like a freaking mental genius. Superb at some things, totally retarded at others. Some of the best distortions I've even heard. Worst wah pedal I've ever heard. Some knobs simply don't do what they say they will. Very occasionally I get bizarre sound freak-outs that acutally sound pretty good - they can be fixed only with switch off/switch on.
Also: great phasers, nice (but almost uncontrollable) delays, death-defying ring modulator.... a rael sicko of a pedal - get one!