Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Have no consistent quality!!!!!! Made in china

I often use Verbatim dvd for movies and data; rarely having any problem. This time is a different story. Over 10 disks are wasted, even at the very beginning or half way of the burning process. I have a good disk, then a bad one on different tries. It is a data life time, but some have problem playing back after few months.