This is a lot less sturdy and solid than the more expensive condos by Go Pet Club, but it serves a good purpose because I needed one for a narrow space. My cats love it just as much as the bigger more sturdy ones, but its not going to last nearly as long. The condos are not wood on all sides like the other ones. Theres a round wooden block as the top and bottom of each of the 3 condos, and just a round cheap fabric that stretches from the top to the bottom and attached with Velcro. It took less than 5 minutes for one of my cats to tear right through the fabric from the inside of one of the condos. Overall, Ill give it 3 stars because my cats do love it, and thats the point, but I suggest spending a few bucks more and get one of the larger more solid units.