FWIW, I am one of the guys who blew up a pair of Z12's last season. I was a leeetle skeptical of them at first, but ummm the price was right (free
), so figured i'd give 'em a shot.
they held me in skiing pretty darn agressively for about 2 months. i jumped and hucked a lot of stuff with them and they never pre-released on me and released when they should have like any other binding should. I really did like their low weight too especially since I had them mounted on a very heavy pair of skis.
However, all the abuse I put on then eventually took it's toll. they finally cracked fatally when I was maching high speed carves down an empty early morning groomer. it was a wierd feeling to be turning one way and then watching my skis kind of floating off in the other direction without feeling them release........
anyway, that groomer run probably isn't what broke them. i'm sure I cracked them and weakened them throughout my time on them....as I can't remember any single moment that would have done them in individually...and the forces I was generating on that last high-speed carve on that groomer was just enough to break the camel's back so to speak.
I would still recommend them for sure. However, NOT if you consider yourself an 'agressive' skier who likes to jump off things and put yourself in situations where a pre-release can have real scary consequences. If you're just carving around the mountain, sticking to groomers, hitting mellow pow, and not getting overly 'aggro' I think they'd be a great choice. As Alpinedad suggested above, there are better bindings out there that can stand up to more abuse (albeit with a heavier penalty in weight).