I know ADCO covers get a bad rap here, but I've been using them since around 2005 and only replaced the first one after 11 years of winter use on my old 2003 Prowler.
Here it is after about 8 years of use..
I got a new ADCO cover for it in 2016 only because a couple of the zippers finally failed to zip...
Then I traded that Prowler for a ton of $$ on the new 2019 Rockwood and the first thing I got for it was a new ADCO cover.. The Rockwood is a longer trailer, so the 2016 ADCO cover would not fit..
So far so good on it as well..
Just my experience with them... I know other's have had them rip up and fall apart in less than a year... So, dunno about that.. They work for me..
Good luck! Mitch
2013 F150 XLT 4x4 SuperCab Max Tow Egoboost 3.73 gears #7700 GVWR #1920 payload. 2019 Rockwood Mini Lite 2511S.