I have a few friends who go here- you have anatomy lectures at the beginning and some asynchronous little courses as well (like you take these on your own time, on your computer, with just a final deadline)
My friends have mixed feelings about PBL- the ones who are good at keeping their own schedules love it. They dont have to spend hours in lecture, and get to plan their day how they want. They did say that they would NOT recommend it if you are not good at keeping yourself on a schedule and learning from reading a textbook.
They said that every PBL group gets the same case and has a proctor. As you are going through the case, the proctor kind of asks you pointed questions and you are looking stuff up as you go. Then at the end each group picks the readings they want to focus on for that case. The professors say that each group ends up with different readings.. but my friends said that people end up having a lot of overlap in what they choose, just because thats what the case needs. You go back and read the chapters you and your group chose, and during your next PBL the proctor will ask your questions based on the readings. Each group technically has a unique exam, based on the chapters they chose. Again, apparently the exams end up being like 80-90% the same, and theres like a few questions focused if you had a reading a different group didnt.