Instruct: Classify a review into positive or negative sentiment.
Query: smelly, noisy waste of money - avoid this product

This product is a waste of money. It doesn't work.It's noisyIt's smellyIt doesn't collect enough urine clumps, but breaks it up into small chunks that never get scooped up, but just continues to smell up your house.The rotating tray is too small and doesn't prevent the cat from flinging litter everywhere.In the month I used it, I cleaned up the mess and went through more litter than my manual box.I can't stress enough DON'T BUY THIS PRODUCT