You will be broken up into groups after a group presentation from the Dean and several students. There will be a tour of the campus, a group activity, the interview (two interviewers and yourself). You will all meet back at the end with a chance for questions for students and staff. It is very laid back. The group activity is not stressful by any means. It reminded me of team building activities. The interview was also very relaxed. It is closed file. It probably lasts anywhere from 20-25 minutes. The interviews are usually done on Friday and letters are sent out Monday, so depending on where you live, you should received your acceptance letter within a week from the interview.
Good luck!!