I think rv covers are very beneficial in keeping your rv clean and provide protection from the elements. You do have to look at it as part of your maintenance routine and it will take you an additional 30-40 minutes to put cover on and buckle it down.
The cover itself weighs about 30 pounds. Weight of cover may be a challenge in trying to get it up there.
To really see the benefit, you must have some discipline and put it on as much as possible. I can see why it can be discouraging.
I have purchased ADCO Designer, registered product and kept receipt for product warranty. They do honor warranty.