First interview was at career center on campus. It was pretty calm, two simple case interviews to figure out how you think and to try to get you to solve basic problems. There's a bit of math prodding in the middle of the interview, but besides that they're pretty straight forward if you've done a few cases from any sort of prep book. Second Interview was onsite in Texas. Three partners, each with an hour long meeting and this time, they're much more interested in how you think in terms of strategy than they are in your simple ability to solve math problems.