I love how it reduces the odor of the cat box. But the perfectly round litter tracks everywhere and hurts to step on. Not to mention that eeewww you are stepping on used cat litter! The perfect round litter is HARD to sweep up. It likes to roll around everywhere. Finally, on a few occassions there was enough of them rolling around on the floor that the box just rolled around on top of them. We could have built a pyramid using this technique! Once, the box tipped completely over spilling half of this round, rolling litter. That was a fun hour to kill!