Although I initially bought the first bookcase for books, it is in the Cat Room wherein all the cats love the different levels of shelves, especially since they can travel up and down shelves without jumping off the unit. 
As a bookcase it is great because the solid wood shelves are super sturdy allowing heavy books, etc without the shelves warping; main reason why I bought this bookcase is because it got more expensive and stressful having to rebuy Bookcases every 3-4 years because the previous Bookcases looked good however shelves were not solid wood and ended up warping.
This bookcase is sturdy, stylish, practical, and of quality for great price.  Looks better in "person."