I first received a phone interview. I stumbled on the first question (easy AMC-level rate question that I messed up quite badly) but did okay on the next two; had about 15 minutes left to just ask questions. I received an invitation to an on-site interview the next day. I had six interviews over the course of the day, ranging from trading to coding, including one where they were trying to see which position I would fit in best and one which was a casual discussion over lunch. It was overall a pleasant but challenging experience. I was quite surprised that I received an offer since I am a freshman and did not, in my opinion, do very well in any of the interviews (did not mess up either I guess). The only downside I would say was possible the relocation to a smaller room, which only seemed lackluster in comparison to the first room. And that the sweater they handed out at the end has some creases on the edges that are really getting on my nerves.