Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Looks good, but not effective for good score

It is really unfortunate to hard to see a good GRE textbook. This textbook looks good and provides some good strategies, but in real test, it is not that helpful because the strategies are too complicated and also too divisive to apply them in a short time. Nevertheless, one recommendable part is vocabulary section even though it is not complete. Personally I think that this part is the best part among all GRE section. However, software is really junk. I got more than 730 in the text of CD, but in real test I received less 550. Especially sentence completion part is not that easy going in real test. I did not look at the math section because I am not worry about my math (because of my major). So I cannot tell anything about the math section. I feel that the math is getting harder in CBT.