It doesn't smell almost at all. I have it on the south side and even in winter the sun dries it.
It doesn't bring in any dust (I have it on the balcony).
It is easily cleaned by wearing disposable gloves, as it dries out the waste.
I keep half a sack for two weeks (I have the large 5-liter one).
The litter box is easily washed, as nothing sticks to the bottom.
I have one cat, but even in the past when I had two (sniff), they were doing just fine.

Although our vet recommended Crystal litter, it turned out to be a very poor choice. It got stuck in my cat's genital organs (female) and caused her wounds, resulting in blood and various fluids coming out. We removed the crystals ourselves, so we are sure that the litter is to blame. My other cat never used it. She didn't want to.

One of the best crystals I have ever bought. It lasted at least an extra week. One disadvantage is perhaps that it has smaller crystals and the cat may throw them out more than the others.