i took it last year...and oh the irony of a adv science student having a WOEFUL science section. with my marks, i would've been mistaken for an arts student, not a science one. and alas i vowed i would study *this time*. errr...which i haven't.

one word of advice: it is incredibly exhausting. even tho you get there early, nothing much happens for a while. you mostly end up stanging in a huge queue...so yes food is your friend. I was beyond dead by the time lunch came.