I have two of these; both the original, and the Third Man version. It's an awesome and unique fuzztortion type tone that is raw and gnarly in a way no other pedal is. They also stack very well with my Treble.Booster, and boost pedals to take them into high gain distortion territory. The gate can be kind of sensitive and prefers a strong input signal in my experience.
The best way I can describe it is like a ragged out of control electrical storm bubbling beneath an extremely gnarly Big Muff or maybe Superfuzz. With the lows up it sounds gargantuan.