Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Better than wasting time with the prep books

I've found all the GRE prep books, including the ones just related to vocab or the verbal section, to be actually detrimental to the learning/cramming/studying process. The vocab flashcards are much better because I don't have to cut through all the clunky (usually incorrect) prose and useless methods that take up most of the space, and my time, when using the books. If you're already good with language, skip the books (you'll just have to learn counter-intuitive processes and then un-learn them) and rock hard on the vocab cards.The one thing I don't like about this product is the size of the cards--they'd be a lot easier to handle if they were 3x5 index card size; they're actually the size of business cards. It would be nice if they were easy to shuffle, like playing cards, but maybe that's just a weird desire exclusive to me.