Well... I attended less than 50% of the lectures because it crashed with my free wednesday. Studied for half a day before the exam because of my core paper in the morning. Din get a jiam tao... Got a B+ instead. If I din remember wrongly, some of the exam questions were based on the case studies of each lecture. So, by attending the lectures, u'll get more in-depth information which isn't written inside the notes. If you don't wish to attend any of the lecture, maybe you can wiki some of the case studies in the notes, like one of my friends. Otherwise, you can skip the external lecturers' talk. They aren't included in the exam... keke...