I gave this 3 stars because it didn't come with all the pieces to put it together.  Super easy to put together, it's only 6 pieces - but we were missing one screw, the one that would have screwed on the smaller bed!  Luckily we had some extras from another cat tree we modified recently so we just used that, but had we not had that we would have had to return it or get a screw from somewhere else.  I got this for my disabled cat so he could have his own "tower" to climb up into and sleep like our other cats do with their tall condos, and it's perfect.  The bottom bed is really small, but the top one is the perfect size, even our biggest cat can fit in it with room to spare.