Excellent material, excellent hardware with easy to use directions. One suggestion for the company is to label the hardware item number within the body of the instruction page on each Step. ON the roof material note with a small sticker of color code which is top or bottom. This can be put together with 2-3 people through step 7, but step 8-13 definitely need a 4th. Extremely sturdy built onto a Trex deck close to our home. Highly recommend this product.