Did not recruit from my school directly but I think we had a lot of people apply so they put together a case workshop for first-rounders. First round was at office, two 40-min back-to-back interviews, each with 10 min behavioral, 25 min case and 5 min questions at end. Behavioral questions were standard and case wasn't too difficult. BCG gave the impression that they were really invested in the recruiting/interview process and consultants were friendly.