Yeah I heard it was tough . Here's a review of it someone messaged me which made me think twice about doing it but it may help you:
"its hard, very hard, im the only HD i know. its hard because of the mid semester where the avg was like 8 out of 20. The final for me was pretty easy, i did all the final exams i could from e-reserve and most of the questions in our final came from past papers so i had already done them. I left the exam after 1 and a half hours in a 3 hour exam. Do enough work (like double any other subject) and you can score well"