I had an Adco cover for 11 years, it held up well with only two minor tears but
it had begun to become a little thread bare so replaced it with a new adco cover. I believe that most cover damage is caused by hi winds which I don'tencounter here. The one thing am impressed with the new cover is that it has 11 under belly straps and my trailer box is 25 FT. long. With that many strap
I should have no wind problems and the trailer will be clean in the spring.
The one bit of advise would be when removing the cover, do so in a manner
that allows you to install the cover by putting it on roof and unrolling it
from front to back and the just pull the sides down.