I just purchased my Hellfire about a month ago, and absolutly love the performance. I do recomend you upgrade your cluth bell to a 16t for extra top end speed though. With the old set up 13t 52 spur gear it's a rocket but lacks top end speed. I race my friends Savage all the time, and we are neck and neck after I did the upgrade. I haven't had much problems yet. It is a show stopper cause people do not know about them.