Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not reliable

Worked great for 6 months. Then it would periodically just get stuck, mid-cycle, leaving the cats S.O.L. (no pun intended). Unplugging and plugging back in would fix it, but this makes it basically useless - we would have to check it constantly, and couldn't trust it when we went out of town. Plus, doing a thorough cleaning is a pain. Lesson learned: stop looking for magic solutions and just scoop the dam* poop once a day.