My interviews were chill (same thing for most people I've talked to, with a few exceptions). They have prepared questions but it feels conversational. There are a few HR-style questions ("describe a time when...") that they give you a heads up about. Just give honest, transparent answers and they'll appreciate that. Make sure you can answer why medicine and why Mayo pretty succinctly. Once you've interviewed, your MCAT and GPA really don't matter at all. They're more focused on how you interviewed, how well you fit the Mayo culture, whether you're legitimately interested in the school (i.e. letters of intent/interest), etc. The AdCom meets every week to discuss interviewees and rank them. You'll eventually be notified that you're ranked (some people get ranked faster than others, don't read into it). After everyone is interviewed for the season, they have one final meeting to decide on the initial 50 acceptances, along with 20-30 waitlist acceptance. Really important to have your letter of intent/interest in before that (the meeting last year was in the middle of Jan). Hope that helps.