Just finished up the interview day and am currently at Midway waiting to fly back home. Prepare to be impressed if you're interviewing!
There are three interviews throughout the day (I had two before lunch and one after, but I don't think everyone had the same general schedule). One is with a clinician with access only to your PS, secondary, and ECs, one is a committee member with access to your entire app, and one is a med student with access to your PS and ECs. At least I think that was the scheme. All of my interviews were really relaxed and very conversational. There's a ~30 minute intro presentation in the morning before the group breaks up for interviews until the lunch/tour.
Lunch was pretty freakin delicious. Everyone gets a small salad, a personal sized deep-dish pizza, a breadstick, a cookie, and a drink. Best lunch thus far for me!
Best of luck everyone.