Instruct: Classify the given Amazon review as either positive or negative.
Query: Not as good as others

I used three books for examp prep, this was the least useful of the bunch. I don't believe I could have passed the exam with only this text or that this study guide affected my score. There are better materials on the web that cost about half as much. Go with the Sybex book. I agree with the other reviewer that the reviews here seem staged.