Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 5 DVDs in a row failed in MacBook Pro

I tried to burn a couple of DVD images using 5 of these DVD-Rs - every single one of them failed with "disk write error". I tried to use some other DVD-Rs I had in stock - all successful. Don't know if this was a bad batch or incompatibility with MacBook, but buyer beware.