Applied through college website for an internship and got an interview offer. Was called to their offices for in person interviews. Had two 30 minute interviews, back to back with two consultants. One was a very typical tell me about yourself, your weaknesses , strengths, why BCG interview and the next was a 30 minute case interview with lots of graphs and charts. I fumbled in one of them and did not get a call back, but the process was very smooth and the people were extremely courteous.