Instruct: Classify a given Amazon review as either positive or negative.
Query: This product is worthless!

I have the new macbook pro and this product will not burn anything, it continues to show errors. I have wasted a lot of DVD R's because of this product. It is slow and is supposed to be universal with the my mac. However, this product does not work. In addition, I have had no luck getting in contact with their support center. There is none!