231s have a bad reputation for not making it to TBO. I am not sure whether they will or won't, but I do firmly believe that most of them will do far better than the reputation. Mine had about 4 cylinder replacements before I got it, and on bad advice, one after I got it. This was before I figured out what was going on. All of them were "for low compression". If you follow Continental's recommendations, when you get a low compression reading, fly it a few hours and recheck it. In virtually all cases, the compression will read different.
Also, turbo Continentals are ripe for engine temperature mismanagement. If you push the throttle full forward for take-off and leave it there, you will get in trouble. Turbo Continentals are not difficult to take care of, but you have to watch your P's and Q's.