Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do Not Buy, It's a Ripoff

This product does not work. PERIOD. I wrote to them for a refund and so far haven't heard back but in fairness that may be because I wrote on Saturday. They also shipped the item in the wrong box. It was a cell phone charger box. This tells me that doing business with these folks for any item is not a smart move especially since given the other reviews they are knowingly shipping a product that does not work at all.