Portions of the proceeds from Stretch and Scratch for caged cats provides free pet beds to Shelters through the Kennel Comforters Project.
Shelter volunteers can attach quickly to cages and there's no mess or anything in the way when you clean up the cages. Sometimes cats start scratching before you finish tying it onto the door! We don't use catnip, but you can sprinkle some into the pad which is a heavier cardboard than storebought pads. 2 cats can share one, they even scratch the sides and top!

Pros: tough, wellmade, affordable

Cons: none so far from everyone I've talked to