Read my primary, brochures from the school, looked over current research publications, read the HMS web-site.
What impressed you positively?
The campus, hospitals, other applicants, current students, the Boston area.
What impressed you negatively?
My first interviewer
What did you wish you had known ahead of time?
nothing
What are your general comments?
My first interview made me want to cry, my interviewer was an hour late, and my (horrible) interview lasted only 15 mins. My second interview made up for it (student), it was a great interview (lasted about 1 hour.)