First of all, there is an informal dinner with current MD/PhD students the night before the interview day. It is held at a small Italian restaurant just up the street from the school in the northeast Bronx. The dinner is really a great time to get the nitty-gritty about the program and life at Einstein. Then, the next day, there are two formal and five informal interviews. Honestly, the formal interviews are pretty straightforward (and in my case, very conversational), due at least in part to the fact that they are for the MD/PhD program. Both my interviewers seemed more concerned that I could effectively describe my research than answer some trivial question about why I wanted to go to Einstein or explain the circumstances surrounding that C+ I got in organic chemistry freshman year. However, talking to some of the other candidates that were interviewing that day, it seems that their experiences varied greatly. As for the informal interviews, they are really relaxed and do not negatively impact your chances for acceptance. In fact, it seems that they are mainly an opportunity for the school to sell itself to the candidates. However, the informals can be mind-numbing (with all the scientific jargon being floated as the faculty members describe their research) so it was fortunate that I had both of my formals first -- others were not so lucky. Overall, I was impressed (and surprised) by the entire interview experience.