I got one two days ago (EHX version). I am always looking for the perfect pedal that keeps "my sound" but adds a little hair in a pleasing way. This pedal's goal is probably not that. Out of the box, experimenting for about 30-40 min, it wasn't doing it for me, and I was going to return it to Sweetwater. Today I remembered about the internal trim pot. The manual says turning the trim pot completely clockwise sounds most like a vintage Percolator. I tried that today, and I am much more pleased with the sound I am getting on both the drive and fuzz sides. It does loose low end, more pronounced on the drive side than the fuzz side. I play through a mesa BD800, so I engaged the deep switch when using the percolator and that helped a lot as a quick fix. It's not going to be my everyday go to for the sound I'm thinking of, but now I do think I'll keep it and enjoy it. All of this was at home, I do have a show Friday, and I will take it with and see how it sounds in a live setting.