This was the first item I purchased from this website four years ago for my soon-to-be-adopted kitten at that time. He is now four years old, and this is his favorite among many cat furniture that I purchased for him. It is still very sturdy after everyday's use of my two energetic cats for the last four years. My cat is now too big (15 lbs) to fit in the cube in the middle, but he still sleeps on the top everyday.