I keep this in my office, where our litter box is also located. I have noticed a considerable cut down on "dust" from the litterbox. There is no smell in there and the air feels and smells clean. I am very pleased with our Honeywell Quiet Clean Ease of Maintenance The filter comes and cleans so easily. Its really not a big deal at all! Dust/Allergen Removal It has cut down on the amount of dust by at least 80%! I do not have to dust this room nearly as often as I use to prior to owning it. My work has lessened in that area!! Filter Availability It removes and cleans so easily! No sweat at all. Comes out and goes back in with no problems Durability So far so good, I havent noticed any problems with it at all Effectiveness I am so impressed with this air purifier. Its small but keeps the air clean in this room like a larger purifier would. I keep it on 24/7 set on low. You dont even notice its on. Very, very quiet. Design Its a nice streamline design. Doest take up much room at all.