Pros: cheap Cons: I fired up this 40 amp ESC with a 2207 motor (for those of you who don't know the motor peaks at around 20 amps) once that wire blew and I saw the club smoking. As I got out of my plane, I lost control and the engine went full throttle, causing the entire model to slam to the ground, nearly hitting two people. Don't buy a speed controller, spend a little more and get a quality controller, believe me, it was worth it