SDN, read my AMCAS and secondary, trolled the Penn State website for potential questions to ask (which turned out to be a very good choice)
What impressed you positively?
Everyone at the school was very friendly and students were generally happy and well-adjusted, even the first-years with their exams coming up. Penn State seems to really care about their students.
What impressed you negatively?
Penn State is sooooo self-contained. If you lived in the student housing, you would be living at work.
What did you wish you had known ahead of time?
I wish I had known that my interviewers wanted me to do the majority of the asking questions. I don't think this is standard for most interviewers.
What are your general comments?
Overall, I was very impressed with Penn State-- the students were friendly and always made a point to stop and say hello; the faculty seemed to care about both their students and their patients (Dr. Davis should run for office); and, the surrounding countryside is beautiful. Advice for first-time interviewees: try to get to know your fellow interviewees because it makes the day a lot less awkward (rather than sitting in a nervous silence). Most of the other people I was there with reported their interviews as being conversational and generally they ran over the 45 minutes alotted. However, both of my actual interviews were short-- not stressful-- just ending with neither interviewer having any more questions for me. I guess this is good? In any case, it was very helpful for me to have an arsensal of 5 or 6 questions ready in order to fill up the remaining time. However, both of my interviewers were kind and truly interested in my success during the process.