Two standard case interviews with partners, back on back (final stage). Atmosphere quite relaxed, sounded more like a conversation - though of course you always have to pay attention to staying on track and delivering convincing, articulated answers. 1st case was more of a brainteaser - estimate the annual income of a taxi driver in Italy. Then a few fit questions (why BCG, why consulting, guide me through your resumé). 2nd case - Food & beverage industry, redefining the distribution strategy, a bit more complicated. Then other fit questions (most important achievement, why would hire you, tell me something that's not on your CV). Overall very positive - I joined them for an internship and the office culture is extremely informal - with lots of empowerment for newbies like me.