I normally do not write reviews however after I read the response from Weber stating that their covers normally will not crack or fade, I wanted to share my expereince. I have covers for both the Summit 670 and Performer grills and they have both have cracked, became extremely brittle and shrunk in size making it very difficult to fit over the grills. To be fair, both covers are over two years old and appear to be made very well but based on my experience, they have not lasted more than two years. Would I buy another Cover made by Weber, Yes but only because I want to make sure that the covers fit well and protect my investment in the grills. Overall, better than most covers but they will crack with age.