Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One of the worst I've owned

I've only owned it for a few months, and it started throwing mostly coasters within a few weeks: both DVD and DVD-DL (surprising for a Sony), even on slower speeds. Burn would complete, but verification always showed multiple errors. CDs were fine. I'd purchased a Sony NEC Optiarc for my backup PC, and ended up switching them because the less-expensive Optiarc was far more consistent & reliable.Perhaps I just got a bad one, or perhaps those who are pleased with it aren't doing verification scans after a burn.