This comes with a lot parts, and it took two of us to assemble over about 8 hours. The instructions were sufficient.  I was pleasantly surprised at how well all the parts went together without any fit issues. We used a battery powered screw driver to assemble which saved a lot of time. The only part that was difficult was the assembly of the roof panels. The instructions have you pre assemble each of the 8 sections of the roof and slide the whole section into the frame. The was difficult so we chose to slide each piece into the roof frame individually which seemed to go smoothly. The one and only concern we have is if it will stand up to New England  winter. Time will tell.