It stinks. It isn't even a smell I can describe - sort of half way between rancid dairy and sweet. I've been using it for less than 24 hours, woke up this morning with the worst migraine I've had in ages and I think it's because of the litter. Just had some normal clay litter dropped off because it's stinking my entire flat out and I can't stand it. Even though two thick bin bags I can still smell it.