So far I would say that this thread raises the followimg points:
1-The whole rail compatability thing is confusing and ridiculous--we want bindings that can mount on flat skis! I know this is in the works...the sooner the better, in my view. I want to get the whole family on Protectors, and have so far held off because of the lack of choice of skis that come with rails, and lack of security that finding, buying, and installing the rails.
2-The bindings seem to work just like regular bindings, which is great. They've been out long enough that if there were obvious problems, if feels like we would know. This is great news. Big sigh of releif and cries of joy from knee ligaments everywhere, with an imporant caveat (see point 4 below).
3-The bindings might be sensitive to forward pressure and/or boot interface in some cases, as posts above suggest. No clear answers, but some questions surfacing. Seems like getting the forward pressure and fit right might be important, but all bindings have their peculiarities, so fair enough.
4-As to their special ability to mitigate knee ligament injuries, it's too early to tell, but I, and apparently many others, beleive having the deck stacked in your favor is a good idea. The theory makes sense, the execution seems functional, and now that the technology exists, we can choose.
THANK YOU TYROLIA!!!