Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent, but could be better

This is a great toy! My biggest complaint is that there is no 12 volt adaptor for car use. I bought this for my kids to use on long car trips and for me to use on the plane. I have been able to use the battery for 3 hours. A 12 volt adaptor by panasonic would be a big asset.Video is very good. Sound is fair with internal speakers and very good with headphones.The unit has stopped a few times and my guess is that it has overheated. This unit get pretty warm on the bottom. I have found that if I prop the unit up so that it gets some air on the bottom of the unit, it helps.