I attended a Booth Live event in October and found it very useful to prepare my application. If you are going now, the best thing will be that there is a lot of interaction with 1st and 2nd year students and with other applicants. I would definitely recommend it.
I interviewed with alumn earlier this week. The interview was very conversational, and although he asked the typical questions- why mba, why booth, what if not accepted, leadership- I really think that fit is the most important thing the interviewer is looking for. One recommendation for all of you that will be interviewing soon is to know the school (professors, courses, clubs) and to give very good reasons of why Booth.
It happens that I will be in Chicago the week the final decision comes, I am taking it as a sign