I saw these,( or something very similar) in one of the local pet stores. I liked them,but since I use a cane I knew I would never be able to get them out of the car & into the house. Browsing on Wayfair I saw them. The price was right so I got 2 one for each of "the Boys" because they don't share. One loves carpet and once in a while rope. The other likes wood. I have a tall tree but only one uses it. He goes after his"brother" if he tries to use it. These are a great buy! They're well made  won't tip when they jump on the top & they love to wack the little ball that hangs down under the top. I saved money and gave my back a break by having them come to the house. The boys are happy with their new posts. I'm happy that they're happy. My little dog likes to sit inside of them and aggravate the cats, or so it seems. I would recomend this to anyone who has a cat/cats.