Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good coasters, bad DVDs

Not much to say about these. There are 100 on the spindle, and I've tried burning about 20 of them, only two of which were successful. I'm going to donate the rest to a school, in hopes that they're compatible with the school's computers. I'll buy some other blank DVD media instead.BTW, I bought a spindle of 100 CD-Rs from Verbatim at the same time, and I have had no problem with any of them.