We went through many different types of cat boxes and different styles of litter for our three cats; all of which did the job but there was a drawback to each (dust, disposal, etc.). We had known about the cat genie for years but had always been scared away by the initial investment involved. Well, about three months ago we went for it and haven't looked back. The machine is a welcome addition to our home and if you have the space for it I would highly recommend giving it a go. Our three cats use one genie with no problems; we just set it on 24 hour cat activation with 10 minute delay and they have no issues sharing, nor do they ever have to use a soiled box. Thanks for creating this wonderful machine!