With six cats in the house, I needed another cat tree, and this was the perfect choice.  They absolutely love this and compete over who will get the upper condo.  Even my Maine Coon scrunches himself into the smaller condo, even though there's a larger one a level down that would fit him better.  The design is great and it's well made.  Putting it together was an adventure as I had many 'helpers' who couldn't wait to jump on it.  Would highly recommend.