bought the 15 x 8 shed after I already had the 10 x 8 shed. While installing the skylight to the 15 x 8 shed a piece broke....probably my fault as I tightened the screw too tight. called and the sent me a new skylight and received it within days.  The service at Lifetime is second to none...I only wish other companies were 1/2 as good with supporting their product. Highly recommend Lifetime....you won't go wrong!!!!!