I've had a lot of interview experience and basically elaborated on what I wrote in my essay.
What impressed you positively?
Very modern campus and facilities.
What impressed you negatively?
Would have liked more time to talk with interviewers, only 30 minutes seems too short.
What did you wish you had known ahead of time?
Length of interview.
What are your general comments?
Very positive. Surprised how nervous I was night before, but felt better once I got rolling. There wasn't a DO in the interview, had a med school prof and a 4th year student. Felt very comfortable.