Instruct: Classify Amazon reviews into positive or negative sentiment
Query: More work then a basic litter box

Bought this two weeks ago, have two cats. Looked good out of the box, plugged it in and it was silent. I used two different kinds of premium cat litter and all the machine would do is pick up most of the solid fecal matter, mince some of it to keep it going around like a fair ride, and leave all the urine at the bottom to form a cement like layer that i had to get a wooden stick to break up so I could change the litter. The room had a terrible litter box odor from about 2nd day after i cleaned it until it was clean again by hand, which took 15 to 20 mins to get it clean. I expected more from petsafe as they design good products that i use regularly. I will be returning this and going back to a regular box, which will be a nice change.