Guys, its easy to find faults in lots of products. I think that any innovation for our sport is a good one. Let the folks that want to run a cordless tether do so, if its not for you then fine, no need to say more than that, everything has its limitation.
I run a corded tether, lots of people tell me that I'm silly and that all it does it get caught on stuff, etc etc. I've never had a problem. Years back, I had one mod sled run away and had it not been for a very small tree and some sled angel watching over me that day, it wouldn't have been a pretty sight. I was not wearing my tether at the time. Since that day I have worn it religiously. I have seen two sleds written off due to collisions with stationary objects due to the fact their riders were not wearing their tether cords and one very close call with a sled jumping off the trailer on a sled that didn't have a tether on it. There's a reason why the RMSHA have a mandatory rule that even if you are sitting on your sled, the tether must be attached to your body, engine running or not.
Lots of guys with excuses about why they don't where them, lots of guys with excuses about why they do. Either way its a personal choice.
My personal opinion from my years of riding - if you ride long enough, at some point - a tether of any type will save you or your sled.
NSC