I interviewed at Minnesota a couple of years ago. IIRC, they interviewed 48 people for 8 spots - reason they "get away" with this being this selective, I believe, is that they do a very thorough job pre-screening and profiling applicants in terms of "fit" (certainly not, at least in my case, purely board scores). At the very least I can say that everybody who interviewed me was intimately familiar with all aspects of my application, good or bad (see: board scores), and seemed genuinely interested in learning more through pertinent questions - including the "ethics room", which I guess you could take either way.
Overall, I found the interview experience at UM to be very pleasant and impressive, winter weather notwithstanding. I cannot echo sentiments that this program is not family friendly; quite to the contrary, I noted a) many female residents and b) many with children. The residents seemed happy and down to earth, and everybody (!) I interacted with during the entire process seemed personable, invested, and genuinely nice.
One downside to me, as noted, was the distances between the training sites...and OK, the winter weather although I really do believe that Minneapolis/StP offers a very good quality of life overall.
In short, I thought this was a superb program that I would have been glad to match at. Alas, I ranked them second and ended up at my number one choice, but would have had no reservations about going to this program whatsoever. On a side note, several faculty, including the program director, and staff contacted me after the match to follow up and congratulate me...again, this seemed like a very personable program, top to bottom. As somebody who did not match there, I recommend this program very highly.
I hope this helps - best wishes!