I had two interviews, one went horribly and one went well. The first interviewer was having a bad day, and just seemed upset and disinterested. The interview was over in ten minutes. The second interview was great. The interviewer was genuinely interested, and had read my application thouroughly. He was very nice and the interview was relaxed, and overall a positive experience.
NOTE: The school is very into 'professionalism' (see secondary) so have something to say on that.