I bought this shed in August of 2010. It is holding up very well. I live in the north east with cold winters an hot summers. Still no problems. I do rake heavy snow off roof just to be on safe side. The instructions were super, as long as you followed them. You don't want to get ahead of yourself. A neighbor and myself installed it in about a full day. A third person would be an asset. Someone who can just keep track of each instruction. I had skipped a step in haste, and had to back track. But, following them to a tee, made installation quite easy. You definately need a flat surface. I was lucky because I already had a concrete slab where my previous steel shed stood. I added the shutters to the window and it enhanced the appearance of the shed. I would highly recommend this shed.