I have put together a LOT of furniture, and this one was the most difficult. The screw holes were too small for the screws, so you needed 2 people to start themm which required a lot of pressure. About half way through, I had to change allan keys, because the one provided was so cheap, that it just started stripping the screw. Once I switched to another allan key (my own from a set) the assemble was a lot smoother. I do like the bookcase a lot, and would order another, but would use my own tools next time. Bookcase looks great, but they need to improve the screw holes and tools provided.