I'm glad some people are pointing out the positives, I wanted to say something but I didn't want to have the usual defensive bias...
Look, I agree that Vandy has too much downtime in the interview day. Unfortunately, interviewers are members of the faculty and they have very specific hours when they can see students, plus some students come in the afternoons and miss the morning stuff altogether, so that requires more of a lengthy day.
For what it's worth, I had fun during my downtime when I was an interviewee. I sat in on both a first year and second year class for comparison, and then wandered around the undergrad campus (which is one of the most beautiful campuses in the country) with my fellow interviewees. My interviewer was nice, but I left with the feeling that I really hadn't done well cause I had felt like the one hour really couldn't possibly have been enough.
I have to remind you guys that Vandy does things totally differently. At other schools, post-interview decisions are made with the interviews being the only new info presented. When the committee meets to decide your fate here, they have a brand new secondary, brand new LOR's, AND the interview. It may feel like it's not worth much, but it actually is just a piece of the puzzle. So ultimately, when Vandy meets to say yay or nay, they have more stuff to talk about than any other school.
Interviews for me were a mixed bag- some were great experiences, some were meh, some were awful. I had more than one interviewer at both of the awful ones. All they asked about was activities/research (hi, it's on my application, how about you try to gauge my personality instead?) at one of the schools, and the other school had just one arbitrarily mean interviewer who left a sour taste in my mouth. Vandy wasn't my favorite interview, but I definitely had worse.
Also for what it's worth, they REALLY mean well. I'm sorry that the execution seems to not work for everyone, but they ask open-ended questions because they want to get an impression of how YOU are socially, stuff they can't really get through your application. If you sit there stiffly and try to move the conversation back to your research and activities and what you like about Vanderbilt, you will look socially inept and you won't get in. If you roll with the punches and joke around with your interviewer, it may not seem "relevant" to you, but it's probably way more helpful, ultimately. This counts for every school, by the way.
As for the anatomy lab, I'm sorry about that. We loved seeing it our year, and my whole class suggested to admissions that they come up with a good system so you guys can see it somehow since it's beyond amazing. Unfortunately, we're currently in anatomy, and we often have lab right before lunch period. Ethically, Vanderbilt believes that people donate their bodies for learning purposes, not for gawking, so only med students can see them. Because of the timing of our labs, it'd be impossible to make sure you guys don't see anything when you come in around lunchtime for your tour, so our anatomy director (who by the way wrote 2 of the 3 textbooks every med student in America uses for anatomy) decided that out of respect for the bodies we should keep the doors closed. Sucks for you guys, but if you think about it, it makes sense.
And finally, about the class makeup. I'm not from an Ivy league, so it kinda weirded me out too when I first came here. The way I see it is this: Vandy is this nationally extremely well-regarded school that always runs the risk of falling into the "regional" trap because it's in Nashville of all places. If they were to accept a whole ton of people from the state schools around here, they might lose their national reputation because grads would stick around here after graduation. Top students from other state schools often go to their own state's schools for financial reason. What does that leave you? Top students from private universities, often ones whose own affiliated med schools are so impossible to get into that the excellent students from the undergrad have to/ want to go to another great private school. Voila, you have the situation we have. For what it's worth, nobody cares where anyone went to school. Two of my closest friends went to a state school, and others went to Harvard. I went to a smaller liberal arts school. We have U Michigan and Michigan State, Vandy and U of Tennessee, etc etc etc. I didn't know one of my friends had gone to Yale until last week when I saw her facebook profile. The chip on the shoulder thing is dead by the time you're in school.
And last but not least, I want to reiterate that the administration and the admission people try like hell here. Say what you will about other schools' interview days, but this place is absolutely fantastic where it counts. You can go somewhere with the tour where they tell you all kinds of bs about approachable professors, throw you parties the day before, etc etc, or you can go here. Last week one of my professors asked me what I was doing for thanksgiving and when I told her I didn't know, she invited me over for dinner with her family. My advisor, upon hearing that I was broke, offered to let me babysit her daughters when she goes on date night with her husband so I can get paid to study at her house. My two deans know me by name and remember what my research is about. Our biochem professors threw us a party (with champagne) when we finished the class. My classmates are some of the smartest, most accomplished people I've ever met. We have division 1 varsity athletes, conservatory-trained musicians, artists, dancers, writers, and policy buffs. We get academic credit here for taking a cooking class if that's what makes us happy. That's the school I go to. Say what you will about how the professors seem unfriendly or things are disorganized, but focus on what matters.