With just gain 1 it is like a TS. With just gain 2 it is like a Rat.
It's marketed as a cross between an OCD and Fulldrive 2 (SD1). This is pretty accurate to my ear. Fuller in the mids and more balanced overall than an OCD, more grit and gain than the FD2 (SD1). I don't hear it as a high gain pedal; more medium gain. It has a similar gain level to an OCD run hot. I like the the Plimsoul beter at medium gain ranges, but the OCD is a better choice for low gain.