Meh, having installed and having to work on them I'm not.
They're great...if you use them before you get stuck and use them under a certain speed on the hwy, (can't remember the actual speed but I think it was quite low but I could be wrong which is not unusual LOL)
Don't spin the begesus out of them if you do get stuck without having them deployed first at which time if you're stuck you remain stuck because they won't throw properly under the tires. If they remain unused for any amount of time they seize up, or at least they do in the ice/snow/salt belt and where else would you use them. They are not cheap to repair.
IMHO good ole tire chains are the best, a lot more work than flipping a switch but all good things are worth working for. My 2 cents worth, that's Canuk bucks btw not US