Cat tree was pretty easy to assemble. Though it really is designed for a kitten or very,very small cat. Our “Puddy Cat” is a long cat, weighing in at 9 lbs. He is too big for the hammock, the circle and little house, my guess is over 90% of cats would be too big to utilize these features. It will help other purchasers if this is marketed clearly for kittens and very, very small cats. I realize it says kitten cat tree, I was expecting