I did just kaplan books for step 2 and UW and Kaplan Questions and others (NMS).
Got a 228/92. I felt the books were much better for step 2 than their step 1 books were for the step 1 exam.
THey highlighted and touched on a lot of key concepts.
I'm an FMG/IMG(the american one) and all my clinicals in the US. I don't get to take shelf exams nor do I get tested reguarly at teh end of my core rotations. So I basically was lazy in studying for 1/2 the year.
So I used teh books. I still have not taken my ob/gyne core (Starts on monday) too and it was my 2nd strongest subject behind medicine.