mamba is a great company and even warranties many of their products after warranty is up, brushless is still very new in the rc world and much is still to be figured out to make dummy proof reliable systems,lots of newbies are slapping together combos that should never be together, and thus problems occur, all the companies have their share of problems its those who stand behind their products with great support i respect. when u put a hight load motor ex.9000kv with a offroad vehicle all the stress is on the esc and the battery. its takes alot more out of the esc to turn the hight draw motor under hight loads