I replaced mg HW SCT Xerun combo (4000kv) with this Tekin set because I was wanting to get more serious about racing. I kept the motor, but the esc is not that great in my opinion. I still can't get it to link up with my pc, it kept shutting down at the end of 5 minute heats and the castle BEC didn't fix it. I also don't like how you have one stroke of the throttle forward for a brake, the second one goes into reverse.
Lastly it kept going in and out of sensors mode.