Took 4 guys, 6 hours to assemble. 2 did most of the work, while one ensured the right instructions were followed and one to hand out parts, tools, etc. Definitely complex assembly needed. Lots of screws, and the hard part is getting things to align. Not tightening the screws till the end for each part is a very good idea. The gazebo is of big quality and looks fantastic. My neighbors were complimenting me on how good it looked.