Know about it?....Its all I use...great stuff. Up here in Canada, it costs about $3.50 for a 35 lb bag, so it is on par or a bit cheaper than wood pellets. Great for odour control and acts in the same fashion as regular wood pellets (it is, actually, just a wood pellet that is specifically manufactured as litter). Read more about this product at their website: http://www.abmanimalbedding.com/index.html . G. A. Christian Bilou [Posted in FML issue 3593]