I have been using the MMPro in my 808 5s/1550kv T8 motor since it was released to the public. Works just fine. Runs cool, fan barely comes on.

The only problem I have experienced is that just last week I got some servo glitching and would periodically lose steering. This was after running a 10 minute main and then bumping up to immediately run a 15 minute main. About 10 minutes in my steering started glitching. I know some units have had issues with the BEC. I am running 400oz JR servo in my buggy, so it may be drawing a bit much for it.

I put my CC External BEC on and it seems to be working fine. Regardless, the MMPro is one of the longest lasting ESC I have had in my buggy.