I’m gob smacked! Adopted a second cat from RSPCA and they gave me a bag of Catmate litter to try. Used to use crystals and needed to change the tray at least every four days with one cat. After two days and two cats using the two tray sifting method the waste sawdust just looked like damp sawdust with only wood smell! Goodbye ammonia. Didn’t go through many pellets on top tray either. I’m sold and definitely recommend this to all.