I took the shelf today and thought it was very different from the sort of questions I saw on Uwise. A lot more management and treatment related. Surprisingly, urinary incontinence was a good chunk of my test. I used Beckmann, blueprints for gyn cancers (got tired of reading Beckmann after 450 pages and the last 50 pages were going to kill me), read half of case files (wish I'd finished reading this, this book is great for the shelf), Uwise questions, and all of First Aid Obgyn. It's hard to say in retrospect, especially without knowing my score, but it seems like reading Beckmann was pointless. It's a huge book and if you're reading throughout chances are you won't remember a lot of what you read in the beginning at the end of the 2 months. It's better, in my opinion, to read something like Case Files and Blueprints twice and supplement with Uwise + other questions. Don't get me wrong, Beckmann is a great book and explains everything flawlessly but this isn't a semester long course and with OB hours there just isn't time to read a 500 page book and review.
A random piece of advice if anyone wishes to experiment with it: The ACOG bulletins are very helpful for the management type of questions.
