Received the interview after applying through the on-campus interview process at my B-school. I had indicated Joburg as one of several international locations, and provided some justification in my cover letter. I received the invitation to interview through email, separately from the on-campus process. The process consisted of two roughly 30-minute interviews. The fit portion of each was much more shallow than my experience with any other firm. Quick and dirty, why consulting, why Bain, why Joburg. One case was very ambiguous, more of a conversation, and nothing I was able to write much about (although that could be why I didn't do so well). Other case was more traditional. Received phone call (ding!) within 45 minutes, but I could tell it was coming.