Have had my Summit S450 for over 12yrs with no issues, still in very good shape. Very happy with it. The cover however, I have had to purchase a new one every three years. For the price it should last longer then that. Either rips on the corners or at the velcro straps. Also have a Smokey Mountain and the cover which seems to be made of a different, more durable material. No issues with that cover, over six years and counting. Have to purchase a new one this spring, thinking of just going with an off brand.