First Aid is known as a "must have" for step 1 prep. What else are "must haves", on the same level as First Aid? Or is First Aid on its own level? Is Qbank a "must have"? Is it as necessary as First Aid? What is the difference between Qbook / Qbank / Qreview? If you buy from Kaplan, can your school purchase it for institutional use? Can you buy and split for use among your classmates? I've heard of "bootleg" Qbanks--old versions in Word format. Where can I get this? Are there other materials available like this? Thanks all.