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We use it in our closed bedroom with two kittens (6 months old). No other litter covers the faeces as well, absorbs urine so well without crumbling when cleaning the tray. The only downside: it's very fine and they carry some of it out of the toilet. It produces hardly any dust, if any at all. In the 18 years we've had cats, we've tried many different litters. But this one is really impressive – though the price is quite something, yes. And I really can't understand the 1-star reviews at all.