Not certain how everyone else got this assembled in 5 to 15 minutes. In all honesty it took us about two hours. The pieces are not numbered. The assembly instructions leave much to be desired. We did not put one side on correctly and had to back all the screws out and start over. Several of the holes were not pre drilled. And where it hinges to lift the roof is impossible to screw on with a regular straight screwdriver.

Once assembled, were quite happy with it. So far the cats have refused to go in but its only been two nights. Hopefully they will enjoy it very soon.