Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't Buy!!!

I made the mistake buying the kenko's 2x teleconverter.It doesn't focus with the Nikon d80 lenses. Don't buythis item!!! If you do buy it, and you decide to cancelyour order beware, of 15% shipping cancelation, and 15%if you decide to return it. Amazon sends your order tothe seller right after you place it You can't cancelfrom Amazon. Your order place right away. Amazon doesthis to a lot of orders. No chance to change your mind.