We just did ours in October and the pod is hibernating right now. It was fine 2 weeks ago when we put the cover on but the real test will come with the heat this summer. We're heading to Key West in 6 weeks and 2 days (no, I'm not counting, why would you think that?) so we can check it when we prep for the trip. When we were applying the tiles we had to keep re-positioning them and we didn't have any problem with messing up the walls. One thing, though, when you buy the tiles check them very carefully along the edges. They come to the store with plastic bands around each stack that are pulled so tight that some of them are unusable because the sides get smooshed and wrinkled. We returned several sheets and explained why we couldn't use them. While we were looking over the replacement sheets one of the employees came along and tossed the returned ones back on the shelf to be sold again. I explained that we had just returned them because they were unusable but he really didn't care. Good luck and holler if you think of any more questions.