We had an Adco cover on our unit for almost 9 seasons before it failed. It was purchased at Camping World while travelling in The US at the time.
The cover was quite easy to install and take off as long as it was folded up properly when removed at the end of the storage season.
We have quite a bit of snow here and we were able to remove snow with the cover in place as long as care was taken.
2008 Topaz F254SS 26 ft.
2009 Chevy Silverado, 2500HD, Duramax, Allison Tranny, 4x4, EC
250 watt solar panel system, BlueSky controller and remote