Instruct: Classify Amazon reviews into positive or negative sentiment
Query: junk

no pun intended but this unit is crap. had mine less than a year and it failed twice. maybe because the advertise it for "multiple cats". I have 2. perhaps its cheap gears etc cant handle "mulitple cats". WHEN it works its fine.the waste receptical needs to be changed every day or two for "multiple cats" If I were you id look at a different product.