First of all, the instructions are horrific.  Secondly, did not have all the screws that were needed.  Concept good, but what a pain.  I would not recommend it unless you have an engineering degree.

Finally got this installed after many false starts.  Advise not to use screws that came with the package; three of them broke off in the wall and I had to relocate the piece.  The screws are cheap and flimsy.  Use good screws so your kitties won't fall out!  

I'm hoping my cats will start to use this.  They don't seem too interested right now.