I'm using it now, after having used pine since December. Our vet steered us away from the woods, as those seem to irritate one of our chinnies. The cell sorb is okay, but I'm hoping to find a good supply of Yesterday's News when I head out this weekend. With the CellSorb, I get some sort of foul urine smell, one that I didn't get with the small bag of Yesterday's News and one I haven't gotten with pine. And this is only after a couple days of changing their litter

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Chinmom to :
Trinity (standard grey), Trillian (hetero beige), Tequila (mosaic),
Speedy (hetero beige) and Batman (standard grey)