Well-thought-out design
Kitten likes to kick cat litter around for fun (it's the newspaper pellets, not the clay, powdery stuff). The protective edge on this tray makes it much less fun, as the litter stays in the tray. And that's a very good thing as far as we are concerned! Very pleased with this. I thought it was a bit gimicky when I bought it, but actually its design is very useful for us.