I just got one and have been playing for 25 years.  I do not like Boss pedals for the most part, particularly their distortion/overdrives/ But the OD-1 is one of the pioneer pedals and have read great things and got one. IT deserves its reputation. Its has a nice, quality tone and its not to ice picky like other Boss pedals. Also, it truely has no gain at zero and is one of the few true boost only overdrives out there. Even my ts808 has abit of gain at 0. I set it on 11 oclock as a boost with some gain if i need it. I put it front of my main overdrive that is cranked. Cranked, this boss isn't overwhelming, think "tush" from zztop or "fly by night" by rush. A clean, quality 70's style overdrive. I could definately use it as a main overdrive but i like my fat rat/ts808  too much. A great compliment to your other distortion pedal on your board. As usual i do appreciate Boss's battery access and reasonable weight/size.