Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useful if you are familiar with the topic, otherwise very dissapointed

A very good article, yet you will be dissapointed because there's not way to see the graphics, so the value of the text decreased (since a lot of reference in it are linked to the graphic). If you are familiar with the topic, you will find it useful, otherwise you will find yourself upset because of the lack of figures.