When the box arrived last week it took me less than 15 minutes to set it up. I am impressed by the quality of the  materials used in the construction, its large square base makes it sturdy and stable. My nearly one year old, very active kitten/cat took to it at once.  It is perfect for him, not only does he blend in with the beige color but he loves the 3 ball catching game, scratches the sisal post, swats at the mice and sleeps in the top bunk!  6/26/18: The cat tree has now been a favorite play/sleep spot for two kittens/young cats and is still holding up well, the top bunk is a favorite sleeping spot. 5 full grown cats now use the battle-scarred tree and prefer it to the taller new tree. Thank you so much Wayfair for the excellent service and prompt delivery.