I have to be honest and say that I was a little bit disappointed. I didn't like the special effects.. (Sparkling Edward!) and they went too fast from one thing to another. You definitely have to read the book first in order to understand it.
I thought the actors did a great job. Alice, Rosalie, Edward and the bad vamps were great. Oh god and I was cracking up at Jasper's face expression.....he does look sick!
I hope the second one has better and more professional effects.