Lasted 3 years. Used as storage cover over winter and when boat not in use over summer. Protected location on urban driveway. Great to start with, fitted perfectly and seemed great quality and looked and felt very durable. But UV starts to break it down and started noticing lots of white powdery dust coming off the cover (from the material breaking down) after 18 months. Also noticed lots of mildew on it over winter (green) especially when wet, although we get good sun over winter. Finally at just over 3 years, the material started to stretch (so you couldn't stretch the tie-downs enough to stop it bowing and filling with water when it rained. Put boat cover pole in to help hold it up - but that finally ripped a hole in the cover. It was pretty much knackered after 3 years, holes and leaks and the material all but falling apart. But for the price, you can always replace it with another one. So a great cover, but don't expect it to last much more than 3 years. I doubt the Premium version will be any different as the difference is only anti-fading - but maybe it does? Maybe the material stands up for longer with the dying process in the premium version. Worth considering.
These grey covers have always been sold as a value range and they are not the same quality as our premium covers, hence the price difference between them.