Every brand has had some problems, not just HiTec.
I've had Futaba servos fail on me at the cost of the plane also.
Won't buy JR anything.
Too much for too little.
Out of 50+ Hitec Digitals, I've had 1 fail, a 5645MG.
Dealer replaced that one.
Of all the servos HiTec has sold, I'm sure therer better now.