When I first started to use my corona set I found it sometimes was a bit hard to get it to recognise the reciever on start up but I have had no problems whatsoever for a long while so it must have been me doing something wrong. I buy the 4 channel recievers and the range is fantastic. It is suppose to be good for 1.5 km and I have no reason to doubt this claim. I can drive until I can hardly see my car and still have full control. At least it has always come back so far.
I would not hesitate to recomend the corona set to anyone.

Terry