The study materials that were provided to me in the form of books and practice books and in the form of online practice materials that was of tremendous help. In my first diagnostics test I achieved only 289 but as I kept on practicing those materials in a way proposed by my trainers Mr. Saurabh Sen(verbal) and Mr. Saikat Roy(maths) I gradually experienced the improvement and that reflected in the scores of the mock tests in which I scored 317-318 on an average. Though I got 314 (157+157) in the final test I still believe that I was prepared enough to get around 320-325 because not to mention that the original GRE test questions were much easier than the practice materials of PR, but unfortunately I achieved 314 because of the stress and tension of taking the original test. If asked I will certainly suggest any friend who is aspiring for GRE to avail the coaching and materials provided by PR. However I believe that the single blank sentence completion questions were too difficult or at least more difficult than I was advised to practice in PR by my trainers. In the mathematics section the inequality and number line type questions were a bit difficult than I learned to expect.
However, in one word my experience with Princeton Review was excellent and I will really recommend PR as a trustworthy institution If anyone is aspiring for GRE.