Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Surprisingly poor media

Media code is MCC 01RG20, which is Mitsubish Chemicals Corporation. They have an excellent reputation, which is why I was so surprised that this media is as bad as it is.I'm using a Plextor PX-708A with the 1.08 firmware revision.The first 4X burn produced a coaster with tons of bad sectors, and visible dye damage. The second at 4X also had visible dye damage, but my recorder was able to read each sector. My Sony DVD player (older and picky) couldn't read it.A 2X burn produced something my DVD player could handle (at least the title screen comes up, and the titles start playing - haven't checked playability across the entire disc). There's still visible dye damage, so I'm skeptical.Having bought this media so I could burn at 4X to produce something my DVD player will like (have to burn at 2.4X with my +R media to achieve that), I'm quite disappointed with the results.