Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Absolutely the pits!

I only used this for a few days. Was trying to make it easier on my roommate while I was on vacation. The cats shunned it because it was way too small for them. The unit does not work as advertised. It spills easily making constant huge messes and does not filter waste as advertised. Don't waste your time and hard-earned money. Amazon should not have anything to do with this terrible product.