Instruct: Classify Amazon reviews into positive or negative sentiment
Query: PIECE OF JUNK

I am a teacher in a high school, and we have these pencil sharpeners in our classrooms. The X-Acto model L is literally a piece of garbage - you could sit there and sharpen for 2 minutes straight and still won't have a useable point for your pencil. A kitchen knife would be easier to use to sharpen a pencil than this piece of worthless metal. Awful pencil sharpener.