I'm not too sure about the format of the MMI, I believe there are 8 stations (this number could be wrong) and you spend 10 mins at each station with two minutes between each rotation. I also think someone told me that the interview at each is different in terms of oral answers, written answers, skill testing etc. Pretty sure we find on March 1st, so this Friday if we have been selected for an interview!
Hope this helps a little, good luck!!