Like most products on here, it was easy enough to put together and didn't take long doing it by myself. However, I couldn't attach the back board (the flimsy cardboard thing) without destroying the rest of the shelf. The nails would not go through the boards. I don't know what it was, but they didn't want to go through, so I had to leave off the backing at risk of completely ruining the entire shelf. I already damaged some of the shelving trying to get in the first few nails. Also because you can't get the back board on, the unit is very flimsy. I keep it against a wall and put some heavy things on the bottom, but I wouldn't trust it not to fall if my cat jumped on it at a certain angle.... Ultimately it was an OK purchase, not my favorite. If I wanted another cube bookcase I'd buy something else. The flimsyness is not worth the price.