Some of the instructions could be better.  Example: install top small quadrant roof before install the cover.  Installing the hooks for the curtains at the end.  Kept having the hooks fall apart before it was installed and locked.  Lastly installing the roof.  (Great tip keep screws loose so that you can line the roof and start from left to right).  At the end tighten all the screws.  I struggled with one side until l followed this for the remaining sides.  Otherwise structurally seems good.  It will take 8 to 12 hours.  You will need 2 people when it comes to putting up the columns and the skeleton of the roof.  Otherwise you can do it alone.