This stuff really works. I spray it, leave the room, walk in 5 mins later and it no longer smells. Much nicer than using scented chemical sprays. A quick spray to the litter box and it stops smelling fast (a "competitor" called Eco88 does nothing). I recommend Zero Odor to clients who move into new homes with odors. Strangely, my kitty loves this stuff, too. He rolls on the floor if he walks in after it's been sprayed.