Not great....
Tracks EVERYWHERE, you only have to look at it, and it's pinging out the tray, smells bad after one day of complete tray clean and litter replacement, and that is after removing all soiled litter, and spraying all over with Simple Solution deodorising spray. Also it's quite hard to scoop up, as it sticks fast to the bottom of the tray, and breaks into tiny pieces when you do manage to loosen it, and also sticks badly to the scoop. Really disappointed, as the reviews seemed good.