The XRB is still the best I have over 2500 flight hours on mine and all I have broken was some rotor blades and a tail boom(Dumb Thumb) and the motors are running fine.I made a couple of heat sinks for mine and I run three 1000mah battery packs that I made for it one after another and I only get up to 100 degrees on the motor when finished.If you really get into it forget the stock battery's make your own the ones I made are great they fly for around 15 to18 minutes and have plenty of power.I used the wire and plugs off of my three old stock battery packs and so they still can be charged with the stock charger,balancer that came with the heli.