This unit took two adults around 5 hours to assemble. The instructions were good but not great. Some illustrations were a bit unclear so you had to figure it out for yourself. All parts were clearly labeled, including all the hardware, which was nice. There are no spare parts so don't drop anything into the grass! We had one acorn nut that had no threads cut into it. Since there are no spares we'll have to run to the hardware store to get a replacement. Some holes didn't quite line up, and some bolts were a little too long, but the final product turned out pretty good. Everything is functional.