This was an inexpensive alternative to a permanent structure. My husband didn't have much faith in its durability, however this coming season will be our third, and it has stayed in remarkably good shape. We can't see any deterioration in the material and the zipper that opens the door is still working. We've had windstorms, snowstorms, and plenty of hot summer sun over the last 2 1/2 years. My husband did add supports (2×2 wood) - two supports up the sides and one across the roof as we do get a lot of snow. A simple preventative measure. Needs a fan in the summer as the greenhouse gets quite hot. This is if you use it for your vegetables all summer, which I did because tomatoes do so well in there. My herbs loved it too. We'll see what season three brings....