Had 2 interviews on campus, each 30 min. One was behavioral, one was a case. The case was very simple and I finished within 10 minutes and just had a casual behavioral conversation afterwards. The behavioral part asked a lot of "describe a time.." or "what would you do it..." centered around group work. Heard back about a week later that I was invited to an Office Visit in Chicago. It was very casual; had a dinner the night before and an office visit the next day. Heard lots of presentations and panels and talked to a few people, but no actual interview. Heard back 4-5 days later with an offer.