All parts went together without difficulty. Instructions were well presented in pictures. You need to make sure you look at the pictures and your part orientation is correct. The parts are neatly packaged and labeled. A great looking product when you are done. Totally took 7 hours to build. One person to do preassembly for 4 hours to stage the parts. Two people on a scaffold to assemble the roof. One person to hand parts up. One person to pull the right components and hardware. Very efficient crew.