I have built one of the kits from byoc (overdrive 2). Never owned a TS 808 so I can't compare it to the original, however I do like the pedal. I have a tendency to change out pedals a lot. That and my crybaby (that is pretty heavily modified) are about the only two I don't change out. No clue how it compares to the original though so I can't help you there. Do you have any soldering experience/equipment? If you know what you're doing with a soldering iron, the kits aren't too bad to build.