I was delightfully surprised with how well it went together. The pieces were well engineered and pre-drilled/pre-cut items aligned perfectly. You will need to pay close attention to the order of the roof sheets to place them in the exact order indicated in the directions. This was not spelled out in the instructions as there were NO written instructions but if you closely observe the pictures you shouldn't have any trouble getting the screw holes lined up. The pieces have to be put down in a particular order for best results.