very relaxed, my interviewer went through my essay and asked me to talk about the experiences there. I was a half hour late for my interview though - double check the time of your interview! There was a misprint on my schedule, but my interviewer was totally cool with it and talked to me for over an hour about topics as far ranging as carpentry and egyptian medicine.
Response Section
Interview Process
Interview questions they asked
Tell me about _____ (insert essay-related experience or ec)