It is a good device. The material for the popup cover does a good job of shielding UV. The life expectantcy of the cover is two years in full sunlighht - southern exposure in Wisconsin. At the end of its service life the material tore easily as sunlight weakened the fabric strength. It fit well. The tie down worked well. I put some foam swim noodles tied in bundles of three between the popup roof and the fabric to keep an air space. The wind fluttered the fabric and kept water exposure and staining to a minimum. There were wear points at sharp edges but they were minor and did not shorten the product life. I was enough please with the popup cover that I bought a second identical item to replace the first. It was pricey but a worthwhile value.