I have a pair. They are not holding up as well as I would have liked, but they are plastic binders to be fair. These are not bombproof by any means. I have had some problems with pre-release on bigger jumps landing backseat.
Normally they stay on pretty well, but upwards release in the toe is kinda a bitch sometimes. They will under normal circumstances keep your foot on the ski though. I am 130lbs, 5'10" and ride them at din 7, and for the most part they stay on, I may end up cranking up the din if I have any more problems.
As for durability, ya, they're a plastic binding, so they won't wear incredibly well. I have had the usual switch landing fuck up, and the brakes, after a couple botched switch landing pulled out of the bottom. Luckily the brakes are held in by metal reinforced bits so you can bend them back in, and they are holding up more than fine now. The toe piece had a bit break off the middle on an upwards release, this isnt a big deal, but occasionally my boot's toe will be knocked out of the middle of the toe piece on a bad rail landing.
All in all, I'd buy them for cheap, like, 60 - (maybe) 80 bucks, but they aren't really worth more.
They are Ok I guess I havnt had too much experience with many bindings but the brake ripped out really easily and bent all kinda which ways of doing 10ft jumps. However as an all mountain binding if your just cruising about and just general jibbing I guess there good for that.
I have the STH14s as well they seem a lot more solid, probably just as much plastic but the toe peice is a differnt design and when you click in it feels twice as solid. Hard to describe but if your gonna get solly id get the 16 or 14 drivers but the 14 is a much better bet than the 12.