Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very good. Probably THE documentary set to own

This kept me going for months (in one hour segments at a time). There is so much material presented here and I learned a lot.I wanted to give 4.5 stars and only knock a half off for the sometimes annoying menu (it could have been presented in a more orgnaized fashion, I thought), or other small problems, but half points aren't allowed on the system. Very close to perfect!