It is a very chill day (more so than other schools)- they do a great job of making you feel at ease. On my day there were 18 of us, so they broke us up into 3 groups of 6. My group toured first, while another group went to interviews and another to something else. You are given the tour by the same two members of faculty that will interview you, which is nice because you can really get to know them over the course of the day. After the tour we met back in the big conference type room and waited for our interviews. All were complete before lunch, and mine lasted around 25 minutes. Some students and more faculty join you for lunch, so it's nice to pick their brain and feel out how the student body works and lives! The interview was fairly laid back, the two faculty members and you. It was open file, but a lot of the discussion stemmed from previous answers and it wasn't simply rapid fire questions off of your application. It was a great day all in all and the program was very impressive!