I have six cats and two cat trees. They LIVE on them! The first one I bought out of the back of Cat Fancy magazine direct from the manufacturer. It has 4 levels on it. Including S&H it ws $123. That was about 5 years ago. When I got it, I sprayed catnip on it. The second one I bought at Petco and it was $100. It has 3 levels on it. In my new place, I have one set up in "their" room in front of the window. The taller one is in my bedroom which faces the street, where all the action is. Of course they also have 2 kitty hammocks, a kitty tent (which they're always fighting over who has dibs on it). To say my cats aren't spoiled is an out and out lie!!