I love the crystal litter trays make it super easy to change it absorbed the urine and make it not smell it has a slot where all the feces goes and it keeps it out of sight the smell is pretty good and its definitely a great litter I know it only needs changed once a month and lasts longer than any other litter you could find . I like that it is just remove put on lid and toss when needed. [This review was collected as part of a promotion.]