I am fairly pleased with mine, has strong brakes and massive acceleration. Don't have heatsink, yet, but it sure does need one will burn fingers after a hard run. Programming is somewhat difficult. took me a few trys to get all parameters right. I use a Maxamps 5 cell, runs great, plenty of power, long run times (120 amp cont. discharge, 6000mah) no problems. the monster pro is probably the best if u dont have mechanical brakes like on a G-maxx revo (i have one) but if u do have mech. brakes, use a Castle HV 125, it is about $40 cheaper, it is lighter, handles more power, and customer service is great. Be careful with brakes on Monster Pro (front flips anyone?)