This is one of the best mats--it's larger than most others, really traps the litter, and one cat likes it so much that he prefers to snooze on it, sometimes to the dismay of those who may want access to the closet with the litter boxes in it!  I have tried other mats, but this is my favorite, although I do not snooze on it myself:)  I now have 4 and am considering more.