Surprisingly, I didn't have to book or anything, just walked straight in. Probably because they had about fifteen showings a day...
First thing - Lucius' ridiculous fur hat when he was in the Quidditch stands. I had to restrain myself from shouting "It's evil time!"
I liked that Neville had some good lines, especially when he was hanging off the chandelier. The pixies were exactly as I imagined them.
Some nice R/Hr-ness, even if it was far too soon. They're still only 12, after all!
I actually screamed, loudly, when the spider hit the side of the car, and got stared at by the goinky teenage boy next to me, who had obviously been deputised to take his little sibs to the movie, and didn't really want to be there. Poor boy...