What a great product! The fact that these granules can be washed and reused is a great value! I do not miss lugging 25 lbs of cat litter to last me one week with my two cats using a regular litter box! They do track the granules out of the CatGenie but they did the same with regular litter as well. I prefer to buy the three pack for the convenience of having the granules on hand. I also like the fact that the granules are non-toxic due to the few times my dogs have gotten in to the CatGenie for a snack. The granules did not bother them at all!