Very solid controller, smooth, easy to use. I'm currently using mine in my TC3 Truggy with 4S lipos and the HV4.5. I did 2 videos of the controller in my TC3:
http://www.youtube.com/watch?v=ZaquBD-lr6E and
http://www.youtube.com/watch?v=_2uIjw_ct08. I'm still waiting to see if HW will make the controller I asked them to make, if not I'll be helping another company produce a car controller and hopefully it'll be better.