This seemed easy enough to put together, if the holes matched! After a bit of elbow grease, removing a couple of dowels that just did not line up, and replacing some of the screws that were not long enough, we got it built. It’s actually quite small, but our two cats have managed to put it to good use, with the help of some padding inside and a sprinkling of catnip. 
Would I buy it again? Possibly, it’s nice looking and the cats do seem to like it.