After I built this bookcase, I realized that it is a game of balance as far as how and where to place the books so as to keep the bookcase balanced. Start with heavy books at the bottom. I like this bookcase because it is really light-weight. 

The only things I would have appreciated from the manufacturer are directions aside from a picture. Line up all your parts like the picture before putting the screws on so as to make sure that holes on each side panel line up with the other side.