No problems with my brushless, in fact I find it more responsive than my V7.1, more sensitive to minor movement in throttle i.e. more steps. Only problem is that there is a lag when 1 st starting, the esc finding the correct position of the pole, and when you spin, it will do that again, time varies from less than a second to about 2 second (spin out and car in opposite position). In fact I think the acceleration is just fantastic especially with a HV. IF you are gonna get a brushless, get the hotest and try a bit of throttle control!!!