The very best!
After having tried all sorts of different types of litter for my Siberians, this is undoubtedly the best (even better than the ordinary Cat's Best, where tracking was a desperate issue, although everything else about it was good). There is honestly NO tracking at all - we do get a few bits on the floor still, but that is through over-enthusiastic digging attempts to cover over the poo, not because it gets stuck to feet or fur, so we'd get that whatever litter we used. However, because the individual granules are larger than the average cat litter, they are also much easier either to pick or sweep up, and we don't have a carpet covered in tiny white specks all the time. It is wonderfully absorbent, so the clumps are easy to get rid of; it lasts for AGES, so is very economical (I reckon about half the price of even pretty cheap ordinary litter) and there is NO smell whatsoever. The fact that it's flushable is a boon too - although I must admit I still put some in our litter locker, as I don't want to overburden the drains.
One of our cats was a bit reticent to use it at first, so I just added it bit by bit to his usual litter, and won him over gradually. Now he's quite happy with it and doesn't think twice about the thought of using it.