Works great until you need to power 2 9 gram servos. The built in bec is to small. Would give it 5 stars if it had a larger hex or came with an external bec. powering 2 4.5gram servos it has no issue though.

I have had two of these 12 amp ESC's. I have used them on two different planes that are 4 channels (4 servos). Both planes would have brown-outs and crash. If I change the planes to 3 channel (no aileron servos), the brown-outs would not occur.

Since I wanted to use ailerons, I had to buy a separate BEC to resolve the brown-outs. This is a disappointment for the mini trainer which I prefer as a 4 channel plane.

I would rate it higher if the built-in BEC output just a little more amperage. Powering only two 4.3g Emax servos and the Hyperion Mini FPV Camera, this ESC was resetting on me mid-flight causing regular brown-outs. I ended up powering the receiver and camera with a stronger 3A external UBEC. If this little ESC's built-in BEC output 2A, I would have been fine and my wiring would be much simpler.