I interviewed at Yale last week and I totally fell in love with the school. The facilities are beautiful and the students seemed really happy.
If you are an independent person who wants to choose how to spend your time in medical school, Yale is great place, because you have a lot of free time. (although many of the students I spoke with said they were a little lost at first, with so much of it.) On the other hand, if you like having structure, or if grades are important for your motivation and self-esteem, Yale is not the place for you, since many exams are optional, and you are the only one who knows your grades. There is also a thesis requirement, but you can take it as seriously as you want.
They were just getting started interviewing and were trying to recover from the strike, so things were not perfectly organized. My student interviewer was great, I feel like I learned a lot about what it actually means to be a student at Yale from her. The interview was conversational, mostly based on my essays. My faculty interview was with a very very senior (=OLD) faculty member. It was okay, he obviously loves Yale and thinks it's a great place to learn to practice medicine. He only asked "Tell me about yourself" and "Why medicine". Try to think of interesting questions for Richard Silverman, since you spend a lot lof time with him and the other applicants.
I was in the morning interview group (7:45 AM), which is really early. they do have coffee (and cookies, if you can stomach them at that hour) in the admissions office. If you are driving in that day, there is construction on 95 just east of New Haven, allow plenty of time for traffic delays.
Good Luck!