He loves all parts, even the large cups, particularly if he's cold. It's very stable and heavy- the weak, unstable trees are the one most cats won't touch as they don't feel safe. He loves scratching it on each level. He can spread out on the top level and because the edges are high, he feels safe. Cushion on top can be removed.
It's our 3rd or 4th order from cat tree king, you can buy cheaper scratching posts but what you'll get is junk. These are not only are strong and durable, they look great!
After about 7 years, the hammocks that came with my order were still structurally sound but were becoming a little worn and see through in the fabric. These were a perfect replacement as expected, and my cats are all happy with their brand new nests.
My cats absolutely love their new cat tree, they already had one which they fight over . This one is so tall they love it.