Wow!!! Heavy box! Some holes were punched through the cardboard from the screws, but it didnt hurt anything. 
Very substantial! Easy to put together- daughter and I did it. Took maybe 30-40 min Soft texture…..(not carpet) so we shall see how well that holds up to her claws and playing. Kitty is still quite young so we are slowly introducing her to it. 
Its quite tall! Three (3) boxeshouses to hid in, a slinghammock near the bottom to lay in, a rope to play with, 2 fuzzy balls with little bells on them, to swat at….. I think its going to be great! Wishing the pink wasnt sold out!