I wasnt sure if my cats would use this. I especially wanted this for Izzy who needs  more activity. It went together easily and as soon as the carpeting was placed, she jumped in and started walking right away. An hour later, she hasnt gotten out to let Jack explore it yet. She walks then lounges. Walks. Then lounges. I could not be more thrilled! Its sturdy and great quality. One of my best purchases to date.