I am new to Catalyst, but I am very happy at first sight. My cat easily accepted this new litter (big relief!), and I have enjoyed the lack of much tracking. Some debris is a must in the cat world, but this litter leaves behind only a bit of a trail. Clumping in acceptable, not rock hard. This really is an environment-friendly litter; the litter is made from thin wood chips, pleasing both my cat and the health of our planet.