Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money...

I bought this book primarily to supplement the other study materials I have and for a few extra practice tests, and I have been tremendously disappointed. The number of errors in the CD-ROM is absolutely shocking. Between the questions that don't give all the information needed to answer the question, the questions that are marked wrong, when they are, in fact, correct, and the questions that don't even give the correct answer as a choice, this is more of a burden than a study tool.In short, the quality of this product leaves a lot to be desired.