Review (3/5): My cats aren't interested in it.
I have 3 cats and none of them are interested in this. It sticks to the glass pane on the door I affixed it to fine. It hasn't fallen off once. I didn't install the little catnip ball that comes with it just because I personally don't trust a catnip ball that came from China. I admit though that the catnip might make it a more enticing toy to the cats so I'll throw some other catnip I have in there.