Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Awful. Complete piece of junk.

This thing doesn't work at all. I bought it for my 4-year old nephew for his birthday so we could write each other messages. He's into spy stuff. I tried to write him the first message on his birthday with this pen and it didn't work. Not just didn't work a little bit, but didn't work AT ALL. Waste of money. Waste of time.