What do you meen by saying before step exam? Do you meen doing kaplan after doing uworld?
I have done uworld subjectvise for 6 month, then random timed with wrongs, so I have done twice uworld, and only after this I am doing kaplan now, averaving 80%. I liked this bank very much because I encountered frequently questions when I wen't like wtf? More frequently than in uworld, and as long people say that real deal is very much vague, I think doing kaplan is good only after doing uworld, so uworld for concepts and kaplan just "for fun" and sake of wierd non traditional questions.