2 cents from an M1 (soon to be M2!) at Michigan...
The curriculum at Michigan rocks and is continually scrutinized by the faculty, with the result that it gets better and better each year. The pace of the curriculum is very manageable, the exam schedule forces students to stay abreast of the material but doesn't crush students, and the material is well integrated. I've learned a tremendous amount this past year, but I rarely felt very stressed out; this place is really student friendly. P/F is the best thing since sliced bread, and Michigan is P/F for the first 2 years. The clinicians at Michigan are brilliant (easily some of the smartest people I've ever met in my life), dedicated and very passionate about teaching. The preclinical instructors, with a few exceptions, are excellent. Students get a lot of patient contact in the first 2 years... There are so many things about this place that I find commendable. The bottom line is that Michigan is a great place to study medicine.
One caveat: The winters in Michigan are absolutely brutal. Do NOT underestimate how cold it gets here. If you can handle the winters, however, don't hesitate to attend. You won't be disappointed.