wow-we have 4 growing cats and a litter problem-i was getting a clumping clay litter and putting up with the smell and odor of the litter. the cats also dragged it on their feet. my daughter came to visit and said that she couldn't stand the smell of the litter itself. i had purchased a ionic breeze nachine before we got the darlings. well-we tried a version from a well known health food like gtocery store-that was a disaster for 3 days over thanksgiving-they wouldn't use it-it crunched and didn't have the smell-yeah-i stopped at a pet-smart and happened to get to talk with the manager-she also has 4 cats. she reccommended the papurr and said that she would only use ut. she instrucred me as to how much to use and how often to add to or change it out.she aid 2 bags would last a month. out of our four cats-we have one who smells so much rhat we all leave when he does his duty. WELL-i emptied out the other litters and put in papirr-timmy-our stinky cat was the first to use it and i was about to escape to the other room when i noticed that he was covering up very well-the others used it and lo and behold-NO SMELL timmy is the true test one of the most important aspects and that the litter doesn't smell. my daughter is starting an interior design bussiness using only natural products. she and i will highly reccommend this product