I interviewed through career services for my MBA program. It was a classic on campus recruiting process. First interview was on campus, two interviewers who you could tell were engaged and attentive. Both asked atypical case questions (neither had a clear cut and dry answer) you could tell they were analyzing how I broke down the problem. Second round was at BCG's offices and I met with two partners, was more of a strategy discussion than a case. They were really down to earth and very interesting people to get a chance to talk to.