We loved catalyst litter for about 2 days. I have 2 litter boxes, and 2 kitties. The initial scent was great, however as soon as my kitties started using the litter, even after scooping, the odor remained. It got worse and worse, and by day 3, it smelled like a barn in my apartment, despite me being very meticulous about scooping well, and stirring around the litter to help eliminate any "one spot" type of odors. Might be great for some, but this litter did not work for us.