I owned it because it came for free and did maybe 40% of it. I thought it would be most helpful if you are doing 50 questions a night while you're studying. Overall, it was too easy (but was OK for PART of your review, to really emphasize the good stuff). I didn't really think there were many questions in that format on the boards. I'd say its best point was to get you thinking about all aspects of something (symptoms, genes, labs, treatment of one disease) which is something you need to do to work through 2 and 3 step problems.