I just picked up a mid (green) model for my sc10 4x4. So far its awesome, I'm currently using a cheap radio system and the servo picks up the poor spring tension of the radio when you let the wheel go. Its kind of funny watching the wheels wobble back and forth with the radio wheel. The numbers are sick, I think the high torque servo has the same speed as most brands high speed servos. I'm currently saving for the radio system.

The only down side I see is the wire lead is just long enough to reach to the rx box in my SC10 4x4. Another inch would be perfect.