Well, having been using the stuff for a week now, I am really impressed
There is no smell whatsoever from the tray, it clumps fantastically well so all poos and wees go down the toilet twice a day, and I've only had to top it up twice, without the need to change the whole lot yet
Max was a bit suspicous at first, he was more interested in eating it than peeing in it lol, but I mixed a bit of his usual litter in there as they suggested, and bingo
As its fine as well, he's not doing his usual trick of chucking it all over the floor
It will be interesting to see how long the bag lasts, and how much more expensive it works out than the old stuff. Hopefully not much dearer, as I'm definitely a convert now