Instruct: Classify a review into positive or negative sentiment.
Query: TOTALLY FRUSTRATING!

I was able to open a few cans, and that was it. It was cool when it worked, but after a week, I am out the money and have a worthless hunk of plastic in my kitchen! This is a completely frustrating gadget that is way more trouble than it is worth. I want to throw it off the roof. I never cared much about a can opener, but I hate this one!