Read sd.net, looked over UMich's website, prepared some questions for my interviewers.
What impressed you positively?
The professional air of interview day at UMich was amazing. UMich holds interviews only once a week, so although the interview group is immense (about 40 people were interviewing with me), UMich is better able to concentrate its resources to make a glossier and more powerful presentation. My interviews were with 2 faculty members and 1 third-year medical student. All three interviewers were engaging, friendly, and obviously interested in my application and in representing me before the admissions committee. Their questions were both challenging and interesting. The rest of interview day was just as good--we got a full introduction to UMich's campus, reputation, and curriculum; a group Q&A with a roomful of friendly current medical students; a full tour--even the financial aid info session was more detailed and helpful than those at other schools I've been to. Perhaps best of all: I received a notice of acceptance to UMich not a week after my interview date. Very, very impressive.
What impressed you negatively?
Not much -- perhaps the winter weather is a little daunting, especially for people like me who are used to the mild, snow-free winters of western California.
What did you wish you had known ahead of time?
How wonderful the interviews would be. The interviewers--and indeed, all the admissions staff--look very professional and, at least at first, somewhat intimidating. But everyone was very nice and determined to make you feel comfortable. It really helped to show the friendly atmosphere among the students and among the faculty.
What are your general comments?
If the interview day is any indication, this school is incredible. Exceptionally well-organized, the interview day showed me by example the degree of professionalism, efficiency, and camaderie evident in the faculty and students of the University of Michigan School of Medicine.