I'll answer for bundy since i've seen it in action. The servo does work well. It seems to be a nice balance between speed and torque for bashing. Its by no means the quickest or the strongests, but for $20 it seems to be fairly smooth without any glitches. Only thing is bundy's one will not work with FM radios, glitches like mad. 2.4 is perfectly fine though

Kieren