This is only one thread of many, just search ... firsthand, I've been on mine (30") since March of '09 and they've failed twice in the course of the ~250 miles I've done on them. The first time was the "usual" shearing of the metal crampon plate; that time I descended Santanoni in a 7 foot snowpack with one floppy, dragging, near-useless shoe. I had them re-mounted at the factory with the Denali bindings, which are much more robust. The second time was just yesterday; it was not a complete failure, but the frame sort of bent and buckled right where the binding joins it. I got off the mountain OK, and I was able to wangle them back to shape approximately, but I'm afraid they'll always be weak there, and I'm sure it will happen again.
It's too bad; they're an ingenious design, and when everything is working well they're my favorites of all the snowshoes I've used; they are light and comfortable, with wonderful traction and sidehill purchase, a terrifically easy-to-use binding, and great resistance to the icing and balling problems that plague snowshoes in general. I've been winter hiking and peakbagging since the '80's in northern New England, the Adirondacks, and in the northern Sierra, Cali coast ranges, and southern Cascades, on venerable products by Sherpa, Atlas, and Tubbs, and these are the most delicate by far. It's a real problem, and it's going to land somebody in a real bad jam someday if it hasn't already. But don't take my word for it, search away ...
Edited to add -- whatever you travel on in winter, bring the means to do field repairs, LOL!