Damn, I only just saw this thread. Bit late now to throw my two cents in I guess, but I used to have the Grunge pedal, had it for about a month about 4 years ago. Personally I thought it was a complete waste of money, sounded really fake to me, if that makes sense. Like someone who doesn't really get what guitar distortion is supposed to be like just cottoned onto the word "distortion" when they built the thing. That's what this pedal seemed like to my ears.
As long as you like it though I guess. 😀