I have seen prior discussions on the Knee Binding here on epicski.com, some fairly spirited. I also seem to remember accusations of shameless promotion by someone said to be closely affiliated with the company (Founder? Inventor?)
Anyway, I thought it would be interesting to post something I read in Ski Magazine over the weekend. I'll quote directly from page 45 of the September issue:
"If anyone has blown an ACL as a result of a rearward, twisting fall while skiing a Knee Binding, its Vermont-based manufacturer isn't aware of it. Given the number of pairs sold, and the rate of rearward-twisting ACL injuries (on conventional bindings, that is: about one per 1,900 skier days, says Knee Binding owner John Springer-Miller), that number should be upward of 300 so far, Springer-Miller says-but it's zero. That's right, not one report. Smugglers' Notch has equipped almost all of its skiing employees with them. Vail, Okemo, and other resorts are conducting their own trials, Springer-Miller says. If you're worried about your own knees, it seems like a binding worth considering."
I don't have a dog in this fight: I just thought it would be interesting to throw this out...