I was actually afraid to open the boxes, because I thought it would be very difficult to set the pergola up. I postponed for two weekends! I finally mustered up the courage to open the three boxes, and once I read through the directions (twice) and read other users helpful hints, I started. I did not invert the pergola, and assembled right side up, using a tree to support one side until the sections were connected. Then everything just fell into place. I fastened the screws from the outside and made my way in, and there were a few of the screw holes on the top rails that did not line up - so I created a new hole with a fine drill bit. It was very easy to assemble, and I was done in 2 hours. SO worth it! I love the pergola, and how it defines my backyard space. Great buy!