Instruct: Classify Amazon reviews into positive or negative sentiment
Query: problematic DVD playback

I ended up taking back three of these machines (which I regret, because I really wanted to save space with a two-in-one unit). Each one had the same problem, intermittent stuttering and pixilization. It didn't happen a great deal, but not one single DVD would play all the way through without errors. CD's played fine, the VHS unit was very nice -- but the DVD playback was an irritation. A service tech tried to play the "it's not a bug it's a feature" game, saying it had something to do with new Macrovision encoding to protect against piracy. Whether he was blowing smoke, or on to something, I do not know. All I know is that all three went back.