I just finished building this. As others said, it's a bit complicated, I managed to build it without another person and I'm not sure how much a second person would have helped. In order to get pieces together you need the bolts loose, for structure you need them tightened a bit. If you open each and close again as you go through it works out. A note to Linda (with the floating shelves issue), the shelf supports (part N) MUST have that support underneath otherwise you won't be able to screw the shelf and support together (see yellow circle in second image).