I have three house cats (two are sisters and the other is an older cat) and they all love to sit on the shelves and watch the birds outside the window.  The fabric that was used to cover the shelves and bottom box is awesome easy to clean cat hair off from.  You can easily drag your fingers across it and the hair wipes right off.  They have gone inside the box on the bottom a few times but ignore it for the most part.  My cats are very social though and maybe a more shy cat would love to use the box as a hiding place,  there are 2 doors to get in/out.