i have the blade 400 never had any problems with the servos i got like 35 flights on my blade 400. i here that the servos are not that great i have never had any problems then again i have never crashed my blade. as far as heli-max heli the cpv3 electronics suck the 4003d should be better with futaba i here that 400 3d is not that easy to fly a guy at our club got that one.