Markers are very durable. By far the best bindings out there. As far as these go, I cannot help you, I rode M900s for six years and never had a single issue.
i don't think everyone will agree with you on that unless they're dukes or jesters. marker bindings were known to brake easily before the came out with their freeride & park series. at least that's what everyone was ranting a few years back.
If your considering putting them on your ski's your bindings must be pretty hurting but its hard to tell from the pic on here ask someone who knows what their talking about in the park or something