Chriz,
I checked out the OCD because I was looking to improve my sound a little. It did and the pedal is awesome. In the music store I tried it out on a RoadKing, but I have a 2 channel Dual Rectifier. Play metal, not death metal, but heavy music, with leads. What it did to the tone was add a low thump and tighten up the lows. You know that sound you get when you can palm mute the high strings and it still has a chunk/thump to that? This pedal helped that out, if that makes any sense. Helped sustain and bite and really helps it cut through. After reading on this board about how good it is, that's why I decided to check it out. A lot of people have the gain all the way down, and the level all the way up. Sounds weird, but that's how I have it set, or the level set at about 3:00. I can't understand why someone would pay $2000 for an amp, and then use the distortion from a pedal. This setting will push your amp harder and improve/increase the saturation. Boosting the level like that will not increase your volume on a distorted setting, just pushes it more. However, on a clean channel, it will boost your volume a lot since clean settings are a lot more dynamic than a distorted tone which is more compressed. I was a little concerned about doing that and called Mesa to ask if that would hurt the amp by putting such a hot signal into the front end, and they said "no".
Steve,
I did compare it to the Fulldrive 2 and it was close. I don't think I would have been disappointed with the Fulldrive, but I liked the OCD more. To me, the OCD on LP sounded more like the Fulldrive pedal, but then switch the OCD to HP and it added a tighter feeling. To me, the Fulldrive low end sounded flubby and unfocused compared to the OCD.
