Had my interview today. my poster was printed but others did it by hand, wouldnt think it matters too much. Pretty laid back really but you never know what they are thinking! The questions were just general teaching skills but i would just say that make sure that you listen and look at all the members of the group! there were about 50 people there, split into smaller groups but they did tell us in the presentation at the start that 1 in 12 people will get accepted, bad news!! Good luck!