I was there two years ago. The workload is nothing to sneeze at, but quite manageable. A lot of it is day-to-day stuff – most of the mandatory classes have “hachana,” where you have to prepare the sources for the lecture before class, plus a couple of weekly quizzes and short assignments. The most time intensive assignments are the reports – you will probably have to write at least 3-4 research papers of 5-7 pages a term. You definitely have to try to pace yourself on those. Also, your workload will depend on how many electives you choose to take.
