[captain harlock]

I have it. It's good, but it thermals alot, although I used it in a 2wd 10th scale buggy( very light) with a 1920/8 and 10 GP3300mah. I even used a 12v fan and even that did not help alot.
IF, you are gonna use it with a 540 sized motor, then you probably need to feed the motor with lots of volts to cut down the amp draw. Even Mike Franz, an official of Kontronik's technical department, said that it isn't really made for use in cars, despite the fact that it has two types of car programs.
I found that it thermals alot when you apply brake more often. Probably if you use mechanical brakes, that'll keep the controller much cooler. Either than that, this thing is smoooooooooooooth.