I just had my interview with an alum, and it went well. We met at a predetermined location, but couldn't find any seats, so walked to another location and waited a few minutes to grab a spot. It was a pretty unexpected start, but funny too. I got really lucky with my interviewer, who was really cool and kept it informal. My interviewer told me that they get interview requests in spurts, so choose your interviewer wisely and schedule your interview asap! And also although the interview is informal, I would advise to wear business attire (I wore a suit and tie on Sunday). My interviewer was coming to meet me from a friend's house, but easily could have been coming to meet me from a social party or on the way to a social party...you never know and don't want to be under-dressed.
And know and prep for all the questions. Total time: 80 minutes
Submitted 1/3, invited to interview on 2/21. Good luck to everyone who's waiting.