For what it's worth I have been running an MMP with a Savox for about a year now and have had zero issues following the initial setup. It may not be the best speed controller out there but I see quite a few of them around the track and for the money they seem like a good buy, especially when bundled with the motor. I have mine hooked up to a Pro4 4600 and my old-school Futaba 3PB with a 2.4GHz module and receiver. When I first built it, the servo would cause brownouts by just turning the wheels. For me the fix was a $0.25 6400 microfarad cap. I think if you are on a budget and want something with good warranty support it is not a bad system.