Not trying to be antagonistic, but almost every single person on SDN who's scored 95+ used almost primarily decks and old tests, and said "avoid Kaplan" (there's an exception or two that used it). The couple of people who scored that high who specifically mentioned the Qbank thought that it didn't apply very well to the exam. You're right though, there are probably people on both ends of the spectrum - it helped you, and has probably helped others. If you've got limited time, though, I'd beware, big time. I know someone personally who is a top-notch student, studied a good deal of Kaplan and Qbank, and regrets it in a major way - they scored far lower than they could have otherwise.