I try to give you a holistic coaching for interviews @ MBB - not only case but also personal part, which is underestimated often in my opinion
I suggest the following structure of a coaching session (we can change it based on your needs/wishes)
-1) General advise on interviewing with MBB - things that Victor Cheng & Co. don't tell you ;-)
-2) Personal part of interview
-3) Case study
-4) Detailed feedback on personal part and case study