I have had this for only 2 days and I have to scoop the poop each time my ONE cat poops. I does not have a "sealed" poop container so, it STINKS!! I dont know how anyone can say it doesnt stink. They must not have it in the house so, they dont notice the smell! The urine doesnt stink yet but, I am sure it is probably soaking through the cardboard bottom as I speak. I will give it another couple of days just so I can see if it does leak. Regardless, I am still returning it to Petco because of the poop stench.