I'm using the Helios, never a glitch at all, which is why I just dont see the need to switch to DSM. The main complaint I've heard from the pro's who have used Spectrum or DSM is that it just still doesn't feel like crystals. Then there are the problems like Craig Drescher had (I'm not sure what brand system he was using) a couple weeks ago at a 1/8 off-road race in UK where his reciever would overheat and the car locked on full throttle twice that day.. I've never known a regular crystal system to do this.