The "superday" consisted of three 30 minutes behavioral interviews, immediately one after another. I was in and out in less than two hours. I heard back within a week. The interviews mostly consisted of me walking the interviewer through my resume. Two interviewers were extremely nice, but one was a complete jerk.

First round of interviews occurred in school. Pretty much talk about your resume and all your work experiences. Typically, you would have either one or two people interviewing you, depending on how many candidates they are. In my case, it was a one-on-one interview. Second round of interviews was in New York City, called a super analyst day. There was a reception followed by the interviews. Citygroup covers the expenses to New York City including food, airfare, taxi fare etc.