For me this is the most USEFUL big muff-type fuzz that I've played. The reason is simple: you can "design" the gain staging, clipping type, and filtering using DIP switches that actually reconfigure the circuit. The result is an EXTREMELY tweakable fuzz that you can use intuitively on the fly. This one muff can function as a massive fuzz, a cutting fuzz, an OD or a crunchy distortion. Phenomenal.