I bought this a few years ago, and within a couple of years, holes and rips started appearing.  I did not purchase the heavy duty cover, and now just 5 years later, the cover has torn on the top in 3 places to the point where I now have to purchase a plastic tarp to cover the large rips so my Corvette will remain protected.  The steel components provided are excellent quality - just too bad the cover wasn't made as well.