We got the 12X15 model. warning: it's actually 12'6X17'. I had to extend the deck to accommodate it. It is well made and not too hard to assemble, except that we didn't have the correct instructions for the hardware we have. Door frames had different bolts and screws than specified in the instructions. It took us about 10 hours for my wife and I to assemble it.
Sometimes it is a little hot inside, but, then again, we wanted one with closing windows because we have cold climate here. It has not sustained high winds or heavy snow yet. As opposed to all the similar models sold in our region, the Wayfair model has 2 tracks that allow the windows to slide all the way down in the bottom panels allowing for more air circulation when very hot.
And guess what No missing parts!!!
Overall, we love it.