I just bought one of these over Ebay and its sounds awesome, cant say ive had loads of fuzz pedals but i cant imagine having another. If anyone is looking for a fuzz pedal i reccomend you get a huck!
It's got the usual gain and volume knobs but also an EQ and a juice knob, and its all very nice and quite reactive, also as usual if you roll back your volume on your guitar it cleans up. This pedal has all the gain you'll want though and i think its based on the fuzz face circuit but its more versitile. sounds great even with my crappy strat copy \:P