Am missing 2 fasteners for one of the steps.  Also, the desgn should turn the bottom box for the openings to be accross from the ledge for easier access.  The cats really like the upper perches and hang out a lot on them.  The perches could be a little bigger.  All our cats are pretty big.  Like the toys being made out of sisel twine.  Had a cat tree before with toys attached with elastic string and the were torn off in minutes.