Excellent and very little tracking
I have tried every litter box going, drive trays with wooden pellets, covered trays, open trays and even the very expensive Litter Robot. This is the best by far. The cats cat dig and dig and no litter kicked out. It’s so easy to clean and the tracking is minimal. I use with Biokats 3 in 1 and it lasts forever. Litter doesn’t get stuck to the sides, no smell. Just brilliant and they look cool!