The overall building is nice but there were concerns while assembling it. The self tapping screws are extremely easy to strip and very hard to get started. For my own peace of mind I drilled and used 1/4-20 bolts with washers and nyloc nuts on one hole of each side of a joint. Be prepared to drill every hole with a smaller bit while putting on the panels because it's very difficult to put pressure on the drill to get the screws started while standing on a ladder or even walk boards like I used. The putty like strip to seal the joints leaves much to be desired and is hard to work with. If you finish with no leaks consider yourself very lucky or very good. If you do have a leak it's not easy to get to the top to caulk or whatever you choose to fix it. Make very sure the base you build the frame on is completely level and squared.