For those who have read the books you will notice what is missing and it puts a slight downer on the romance in the beginning. The whole getting to know each other bits had to be shortened obviously so it wasn't a 4 hour movie. But if you are a true Edward Bella fan and realize that they can't fit everything in you should walk away feeling satisfied for the most part. It's funny and almost every actor plays their character to a tee. I loved it, even with its faults.
If you haven't read the books I would suggest you do that first. It's a good movie, but completely made for the book fans.