i can score the Berzerker Od at the same price as an used Boss Sd-1 Taiwan (really cheap). I have many dirt boxes (Ts808, Ts9, Rat, Plexitone, other DIY modded od´s) so i dont need/want buy both pedals. Its the Berzerker Od a "better" pedal? Never tried an SD-1 or the Berzerker. The last one seems more rugged, has cooler look and better construction. The Boss can be modded to personal specs and reverse it anytime, which is cool too. The purpose is to goose a JCM 800 style amp to "classic" high gain levels (think Guns n Roses, Ozzy, Dokken, Ratt, Bon Jovi, etc), but with a diferent flavour...more vowell-y and open than a classic Ts808/Ts9, also brighter, more cutting and tighter.