I got an Etronix and it just stopped and it would't bind. Took it back to the shop and got the replacement straight away.
The throttle side failed and the receiver went into failsafe mode.
For £71.00 I doubt they'll last forever but I rather drop an Etronix than a KO or Futaba.
So far so good apart from the car went into failsafe mode when the voltage dropped below 9v on the transmitter, the charge light didn't come on though???