Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This kindle is junk

This kindle is one of the worst purchases I've ever made. The screen froze up after only about a month of use, and calling technical support has been a huge waste of my time. I've been on the phone numerous times, and all I get is the run-around. Sure wish I had done more research before ordering this piece of junk. Can't get approval to send it in for repair, and can't get a refund. This will be the last thing I buy from Amazon.com