The holes on top do not align  properly with the side pieces holding it in place. Hence, the top pops off and continuosly has to be popped back in.The two doors have wide gap in between them. Naturally, I am disappointed since I believed I would be getting a "perfect" product and was willing to pay for it.
I wanted to make sure this was assembled 100% according to the directions and hired a professional.
I give it 2 stars because the concept is great  as long as I keep popping the top in place and hide the front from view . It keeps the litter where it belongs and the cats do love it.