We use these at our dog boarding kennel. We have one set up in each wing that will house 10 dogs in each. The greatest compliment we get when doing tours for clients, is that it doesn't smell like there's any animals at all in here. We will continue to use them, as they work extremely well. There is a very slight scent, but it is not overwhelming at all. It absorbs odours, rather than covers them up with another smell. Love them!