[MetalMan]

I've used a Mtroniks Genesis Truck and a MGM Compro 12012.

Mtroniks - very smooth, WATERPROOF, great customer service (2 weeks total from California to England, no money paid except for shipping there). Reliability isn't bad, had only one go up in smoke. This controller doesn't seem to like external BECs, my XUS Hobby UBEC causes terribly stuttering/glitching on my Truck with the red wire removed from the receiver connector, but is perfectly fine using the built-in BEC.

MGM - very smooth, brakes that do weird (bad) things for racing/track running, not so good customer service. Sent in my damaged (I think from water) 12012, and repair took 6 months, during which time none of my 10+ emails were responded to (from multiple email addresses, including from Mike). So far on my replacement the BEC has blown out on 4s Lipo (it's visible on the shrink wrap), whereas my Mtroniks Truck is perfectly fine (so far) using the built-in BEC on 4s Lipo.