Well, I've had my JR R-1 outfitted with the DSM Spektrum. I'm running it on 1/8th scale buggy, 6.0v batt, JR digital steering, JR Z590 throttle/brake. So far, no problems, the steering servos seems to really light up, but that may be my imagination.

I was so happy, I ordered an extra Spektrum receiver. Got it a few days ago, tried to bind it to the transmitter...binding unsuccessful. The receiver acts like the bind button isn't doing anything. So far I'm batting .500 with the spektrum technology and I guess I'm not extremely happy about the delay (I have to ship the bad receiver back to horizonhobby) but hey, I still am happy to be part of the "new age of RC"