The Od side nails that great TS sound, and the Comp is great for everything from Nashville "squish" to sustained lead when used with the OD side. Probably my favorite pedal of all time ( or at least tied with Wah!!!)
It's notoriously hard to mate an OD with a RI Fender amp. Most of em sound fizzy to my ears. The VS RT-66 sounds amazing through my DRRI. The only other pedal to come close is (believe it or not) the MXR ZW-44!!!! I'm talking Blues/Roots lead stuff....not Metal!!!
Ian