hey duncanst,
I'm graduating from the U of MN Medical School this year. Mayo no doubt is a great medical school and I'm not going to say anything negative about Mayo, so I'll just focus on my experience of MN:
1. Medical school is a class of 165 with a good mix of MN residents and non-residents, and you'll definitely find your niche of friends. It can feel like going back to HS at times cause you have lockers, the winter ball (even a "Malpractice Ball" with the law school students), and the cliques, but you'll definitely find your set of friends you'll gel with.
2. And if you really don't feel like attending 4 hours of lectures in the morning for whatever reason (sick, hangover, etc.), the lectures are taped and immediately loaded into the web and can be watched at a faster speed (only take 2 hours to watch 4 hours of lectures).
3. Flexibility: Majority graduate in 4 years, but with the new Flexible M.D. program, you can graduate as little as 3 1/2 years to 6 years. There's ample opportunities to graduate with a dual M.D/J.D. or M.D./M.B.A. or M.D./MPH, etc. You have plenty of free time (26 weeks) to do research, away rotations, have a family, vacation, etc.
4. Social: Most of the med students at the U are pretty passive-aggressive, in the sense that everyone takes med school seriously and studies hard, but they never really admit it and would rather project themselves as well-rounded social butterflies that exercise regularly (most participate in marathons) and get their party on at the clubs/bars in Uptown and 1st Ave. Because U of MN is a Big-10 school, and if you don't feel like being around other medical students, you can easily study in other parts of campus, and socialize with students outside of medical school.
5. Residencies: We just had our match last Thursday and the majority of students got their 1st or 2nd choice and got into great programs in MN(Mayo, UMN) as well as great out of state programs (UCSF, Yale, Cornell/Columbia, Thomas Jefferson, Northwestern, etc.).
Overall, U of MN is a decent medical school that has the resources, so that if you really want to pursue any speciatly you want, or want to go to Uganda for AIDS research for several months, etc., you'll get what you want.
Feel free to PM me if you have any other questions and I'd be happy to help.
good luck!