The CM-2 offers a Level, High, Low, and Gain control plus a mini toggle switch that selects between Classic and Modified mode. In the Classic setting the pedal chucks out some gorgeous tones that bring the old Tube Screamer to mind. It has plenty of grit and spank on a low gain setting - especially if you dial out a little of the lows and knock up the highs. With a Strat and aggressive use of the fingers you can get great bar room rock-blues that just begs to use a slide. Upping the gain brings in a more classic rock tone that never feels over-saturated, allowing arpeggios to ring out distinctly. There's a cool organic sound to the overdrive too, with the kind of sparkly edges that you usually have to pay a lot more for.
The Modified circuit fattens up the gain and low end. It doesn't turn the CM-2 into a metal distortion, but it does add some nice sauce to an already tasty meal. We loved the neck pickup of the Strat with the pedal's controls set to 12 o'clock and the gain at three o'clock: this gave a raspy, edgy tone that felt a bit like a fuzz pedal. Hendrix ahoy!