Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Should be better than it is

A bit outdated. You're buying a PDF of questions and answers. It was last updated in 2009 and some of the numbers have changed since then. Still gets the basic points across. It is helpful, but the test has changed recently and the PDF hasn't. Just know what you're buying. They give you an option to download the product, which is nice and saves time.