I have been using Fresh Step Extreme for the last few months.It works for me. I have three cats,and when I tried lots of clumping litters I had a very hard time cleaning out the boxes,when I washed them out.The clumping litters would adhere to the plastic.I had to work hard scraping the litter out.I clean out the boxes about five times a day. I feel the cats appreciate that. I wash them out twice a week. Fresh Step Extreme seems to take care of any odor,and its easy to clean.