I interviewed last Friday. This was my first interview and I was terribly anxious in the week leading up to it, so I was pleasantly surprised when it ended up being a very low-stress day. All of the faculty I encountered were kind and welcoming, and the students were genuinely interested in sharing their experiences and opinions with us (one even told me that if I get into a cheaper school, I should just go there haha).
The day started off with short presentations by various departments and a tour of the academic building, followed by a catered lunch with med students and then the interviews. You're allowed to leave as soon as your last interview was over, which was nice since I was done by 1:30. The interviews themselves were, as others have said, very conversational; no surprise questions or anything I felt unprepared for.
Best of luck this week!