This is ok.  I was glad I had my husband to help me put it together.  I wanted it to be a little cat station with her food and water on top and litter box below.  I’ve managed that by adding a rubber strip on the top.  It’s so slick she couldn’t safely jump up there even though it’s not very tall.  Also, I opted not to use the shelf because there isn’t enough room for her to squeeze through the hole and into the litter area with it there.