Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Money Pit and Nasty

I've never been inspired to write a review before this, but just had to speak up. I bought this because changing regular litter triggers asthma attacks for me. Seemed like the crystals would be a great idea. NOT.We have one cat. Granted, he's a bit large, and he's senior, so he probably "outputs" a little than the average feline. But he's normal and healthy.Each tray lasts about 5 days with our one cat. Then the crystals are saturated, the bottom of the tray is swimming, the house stinks and the cat starts to pee on the floor. Stirring the litter does not help. It is not stuck behind the rake. It is not getting scooped into the poop area.Removing the old tray is NASTY - smells like, well an old puddle of pee and the contents is just about sloshing. Ewwww. The smell is about enough to trigger an asthma attack just on pure yuck factor.5 days. $15 per tray. Nasty outcome. Recommend spending money elsewhere.