The interview starts out with some basic questions about you and your interest in consulting. From there it goes into a cookie cutter case where you size a market. The interviewer intentionally tries to make it more difficult by asking increasingly "difficult" (read: needlessly confusing) questions (must be because case itself was pretty simple). Afterward there is an opportunity to ask questions. Overall, a lot hinges on whether you connect with the interviewer, which was difficult since the interviewer was generally a bit awkward.