Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not worth the money

I hate this product. It's noisy when it goes off and can be heard all over the house! It even wakes us up at night! In addition, when it cleans the box, it dumps a small amount of litter out on the floor each time (the loose litter that surrounds the clumps and falls over the edge of the waste container in the process) so over the course of a short time, I end up with litter all over my floor.I am surprised to also say that without a cover (which can be bought separately but costs half the price of the box itself), the smell is much worse than my old, cheap litter box that had a cover with it.If I thought you could return a used litter box for credit, I would. I don't recommend spending this much money on this item--I had other people tell me they thought it was great before I bought but it's been anything but that for me.