You can always spot a covered trailer vs. one that is not. Especially on the top of the awning, decals and roof. Our new TT is 3 years old and looks good as new. It's covered year around. I've heard every excuse not to cover. It's time consuming, we take it out to much, wind, It's too much effort etc. We camp every month and I pull the cover off the night before and put in on the day after we get back. You can slide the cover off from the ground. I roll mine so that when I'm on the roof I simply roll from back to font then flop the sides over. It's on in less than 20 minutes. It just withstood 50-60 mile gusts. A good cover with a good fit and properly put on will wrap the trailer like a glove. It takes a ton of wind and a worn out cover to fall apart. After each trip my TT is pressure washed including the awning and roof and detailed with 303. I treat the roof every 3 months (no dirt to create sanding between the cover and the tt) I have no evidence whatsoever of the cover messing up the finish. There is no haze yellowing of plastic and the finish is still as glossy as the day we got it. From the trailers on the road I see daily it's clear that most folks just let their trailers rot with little or no maintenance and no protection from the elements. We plan on keeping our trailer at least 15 years and so far it still looks new. The money you'll save on just the awning alone will make up for the cost of a new cover every couple of years. Add to this, aesthetics and the additional re-sell it's just plain worth it in my opinion.