It was super easy to put together, all the parts fit purrfectly!  I have 4 cats and they all LOVE their new Multi Level Cat Tree!  Each one of them has been at the very top, in the middle, on the hammocks....they're having the best time.  I think my dog is jealous that they have a jungle gym of their own and he can't play in it.
This is a fabulous must purchase item!  The price is two thumbs up!