I have a hood toilet in the bedroom are. Since it has annoyed me that the cat litter is always distributed in the room, I have now bought a large plastic tray 100x50cm. In one half of the shell the toilet and in the other half -before turning off / Eingang- is I put this mat. This construction has already proven to be very good. Since the cat has only one exit and thereby directly into the bowl and on the rug occurs verlbeit the "sandy beach" about 95% in the shell. A few grains of flying still outside, but I can live with.
How well the rug in bowl toilets -without such Konsturktion- help, I can tell only conditionally. A smaller, semi-circular version of I'm in my bath, which fits in only one bowl toilet for reasons of space. Here the rug brings nothing. Despite the rug cat litter is everywhere and it must be vacuumed every day.