Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Most reliable.

I'm using a Pansonic DVD recorder, and was using TDK DVD-R & DVD+R disks, but when they changed them about a year or two ago they started to fail regularly, often half a package of them would be no good, so I was forced to search for another brand. I tried several including Memorex, HP, Sony, Verbatim, & some store brands, and they all had a higher failure rate than I could accept, so I suspected a problem with the recorder - but when I tried these Magnavox DVDs, to my surprise the DVD-Rs have all worked perfectly and only 1 out of 100 of the DVD+Rs failed. Occasionally I've tried one of the other brands I still have left over and they still fail sometimes, then these work, so it's not just the recorder.