Reef's servos have been around for a few years.
I've made a recent purchase of Reefs RC, 3 RAW 800LP Brass to be exact. 2 of them have failed within the first 30 min of run time. They were sent back, and the fault not covered under warranty (out of pocket $90+ bucks both times). They claim the issue was a voltage surge. Hard to believe considering I'm running a Castle BEC, which has yet to fry ANY other brand servo I've had installed (Savox, NSDRC, and Futaba). The 3rd one, I sold before even giving it a chance. 66% failure rate is appalling.
For now, I'm sticking to NSDRC - Protip: If NSDRC doesn't have them in stock, Check DLux fab, they might.