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

My litter box worked properly... maybe twice.After that, the litter box runs continuously. When it does run, it does a terrible job of cleaning. No matter what kind of litter I use, the clumps get stuck in the rakes, and the unit doesn't have enough HP to push the litter forward.The unit will run forever, even with no litter in it. I'll be purchasing another automatic litter box for when I go out of town, but it won't be a LitterMaid product. This product is garbage. Do not buy one.