we had an adco cover, lasted about 4 years, did a good job but was heavy and bulky. When it needed replacement dealer recomended a classic accessory cover with ripstop nylon. 4 years and going strong. much lighter, much easier to install, and fits in a small toat.
I can remove the classic accy unit in less than 15 minutes, not much longer to install it. The adco took longer because of the bulk.
We store our trailer in a community RV lot. walking around the lot in the summer it is VERY obvious which trailers were covered. no or minimal black streaks, no faded or pealing graphics, no yellowed plastic trim, no oxidized sides.
pick what works best for you.