(tl;dr - Do not buy this if you live in a climate that regularly gets below 40F in the winter. The closing mechanism will break)
I've owned this for about a year and a half now, and it's already time for a new mount. When it gets below freezing the "claw" closing mechanism becomes incredibly stiff and makes it very difficult to close. When you put that much pressure on it -- the teeth "skip" and once it skips it's impossible to reset the teeth back to their original offset. The result is that it holds your phone off-center. This honestly wasn't a big deal the first or second time -- but now it's skipped about three times and it's starting to become a functional issue. It's so off center now that the "feet" at the bottom interfere with the charging cable. One or two more times it will not be able to hold the phone anymore.
I do not drive very often, so for your average person I would except it to last one to two winters in a northern climate. I personally haven't had the issues others are reporting -- and if I was in a warm climate would probably be satisfied.