We use this with a Van Ness enclosed cat litter tray and it is very good at catching the litter from their paws as they leave. Also easy to pick up and shake the collected litter off into the bin with no mess. I agree with the other review though, it is pointless in an open litter tray without a lid, as the cats will just walk around it. NB it says colours may vary. I was delivered a cream coloured mat.
Bought a few months back hoping that it would stop the trail of litter around my flat. This has made no difference what so ever. If it was 5-6 foot long then it may work but being so short the cats just jump over it. A complete waste of money in my opinion.