I can't comment on the luup box, but you are correct, it's one bag per box. This should be plenty for your 2 cats. I have never experienced pretty litter sticking to any of my cats and I've been using it for a very long time, but I'm sure it's a possibility if the cat has long wirey hair.
As I was skimming the net in an attempt to see how others felt about Pretty Litter I came across this thread. Although I saw plenty post about the billing issues, I saw few reviews regarding the actual product, so I figured I would give my experiences with the product. As for the billing, I...