I dunno, it actually seems like it might be pretty helpful. I mean, you can memorize all the review notes, but that doesn't necessarily get you the ability to answer all the questions. Assuming the problems solving guide really does contain all the high-yield problems, then at least we'd know how to solve those for sure, which would be a real edge up on the MCAT (especially in the discretes). But that's assuming these problems truly are high-yield. Has anyone verified this?