Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Indispensible for cross-country trips

I recently returned from a trip (Chicago to Upstate New York and back) with two children. The DVD player performed flawlessly hour after hour with no complaints concerning picture or sound quality. I noticed none of the problems with that other reviewers noted. However, we are very careful to keep DVDS clean and to place them in their holders so that they do not scratch.