I've had two of them for quite awhile now. I've beat the hell out of both of them as well and they still work.
My chrome one has a flaky button that doesn't always work. If you move it too fast the button lights up. It also has to be held in a certain position to have any of the menu stuff work. I regularly have to pull the battery because it does the fast flash for no reason.
My black one, it's a trooper. That thing has been dropped and come apart more times than I can count. It was kind of scary the first time the guts popped out of it. It's the norm now.
They both still work, so I haven't resorted to sending them in to have them "fixed" yet.
If you take care of yours (which I haven't), they will last a long time. Both of mine are hammered and they still perform well overall.
I just took the black one apart for this pic. Give it a wiggle and the top cap comes off.
edit: Just to add, I do prefer the Mad Vapes VV box mods to the Provari for a daily device. I just ordered a new one tonight because my old one is getting flaky (switch is on it's way out). I love those things. I got probably two years out of mine and am happy with that considering the price and construction of it. It gets banged around just as much, if not more, than my Provaris. All it has to show cosmetically is some cracks by the connector.