Absolutely useless
There are a few things I expect from ANY cat litter to justify it being marketed for that purpose. It should absorb urine or clump so it can be removed. This absorbed very little, which resulted in the bottom of the tray being doused in urine and consequently the whole lot had to be changed every four days! (two cats to two trays). It should help with the odour: Sure, I didn't notice anything for the first couple of days but after that you notice the sharp wee smell (which I found out later was the wee pooling at the bottom). It shouldn't track, and didn't. But that's not enough reason to buy this, I could have just taken random pebbles in a tray and got the same effect.