I recently completed this process and it is quite difficult. The 70 min 35 question exam is a real pain in the a*s…. However I noticed infact that the exam questions are based on case study's from example case interviews from all the top strategy firm websites (eg ATK, BCG, BAIN, McK). If I were you I'd down load all of the example case study's and at least learn the format, maybe even the answers if your really keen…As for the case interviews.. Read the Mckinsey Way, use the MECE diagrams, and ask insightful q's… Practice doing wild numbers in your head..SCUD