I purchased this for my 10 yr. old yorkie who was having difficulty jumping up to our couch.  It was easy to assemble, however, he was terrified of it.  I placed him on it and his nails made noise against the plastic and he slipped and lost his footing.  He scrambled off and would not go anywhere near it again.  I disassembled it and put it back in the box and it's now in our garage.