I was pleasantly surprised by how substantial this bookcase is - i imagined it to be smaller.  My plan was to use to to store sheet music books, which are a lot taller than regular books, and don't fit standing up in most non adjustable bookcases. All my music books fit and I didn't have to lay any of them on their sides. The middle shelf is bowing just a bit at the center due to the weight of the books, so I will need to put fewer books there. This is not a deal breaker - just know that you can't really put heavy things on the shelves. I will definitely repurchase this in the future, if I need another bookcase. Very easy to put together, too.