You definitely need at least 2 people to assemble the roof section; otherwise one person can do most of the work. The directions were pretty easy to follow and while there is a bag with 'extras' we still had to go out and get 2 of one type of screw and washers. Had to dip into the extra bag for the other washers but there were plenty left over. One of the pieces holding up the roof was quite bent in the box but we were able to mostly straighten it out after heating it up a bit. It looks really nice overall and we were able to assemble it in just over 8 hours. Do pay attention to the orientation of the posts because there are little guides for where the roof braces go. We missed 2 of them. Would definitely purchase something similar again.