I cover my travel trailer 6 months out of the year in the midwest. (nov-april). My 10+ year old unit still looks fantastic for it's age, I 100% attribute that to the covering. I was getting 3 years, I spent a bit more and bought from CarAutoCovers last time. I'm on year 4, and I am starting to get wear holes. It has a lifetime warranty, the catch, you pay shipping. The cost last time I checked was close to $100 to get a replacement. So, I will say that is a fair trade. I plan to get a new top this summer, unless I upgrade and buy a different trailer (kinda wanting a bit more room) I cover my wheels and tires as well, mostly for sun fade. Part of the trick to success covering is, use pool noodles and blue painters tape, minimize the wear points, and keep pretty tight, less the wind can get under the better. My current wear points are the AC unit on top, and the rear bumper corners. Not sure how I could get around the ac unit, the rear bumper I think some bubble wrap maybe next time.