They make sure you have a good sense of what PBL is throughout the day.
What impressed you negatively?
I think they should have a personal interview as well.
What did you wish you had known ahead of time?
The details of PBL.
What are your general comments?
It's a different interview format. Not any less stressful than other traditional interviews, but different. The rest of the day will allow you to get a good feel if PBL is right for you. They take you to a real class, give you a lecture on PBL, let you talk to students in PBL, and put you through a mini-PBL case during your interview.