The washable granules are awesome! Our cat has asthma and traditional clumping litter has a lot of dust (even the dust free ones) which could trigger an asthma attack. Ever since using the CatGenie with the washable granules our cat is much better with his asthma. One thing that could be improved is to have the granules be a little heavier as another cat is still trying to get used to the lighter weight of the washable granules. Other than that, it is a great product. Thanks CatGenie!