The cover is basically quite well built and does well ...
The cover is basically quite well built and does very well.  It is made of heavy duty, water proof material. It fits my wife's portable mobility scooter very well. The tie-downs hold it firmly in place.<br /><br />The corners are not reinforced. I suspect it was designed for use with racks with rounded corners, or to tie inside the corners of the rack.  In such cases it should do well without reinforcement.<br /><br />In my case, my rack has 90 degree corners and I wanted to completely cover the rack.  It only took one 1000 mile trip to wear holes the two front corners, even though I attempted to pad the corners of the rack with rags, which did not stay in very well.  Had the corners been reinforced, I would have given it 5 stars.  I will get the corners reinforced, probably with a heavy vinyl material, then there should be no problem in the future.
Rating: 3 stars