Kristin Stewart and Robert Pattinson were still not terribly good actors, although Kristin was better in this movie than in Twilight.
Taylor Lautner really raised the movie to a whole new level in my eyes. He really got into the character, showing a deep emotional connection to the situation, so much so that I had tears in my eyes when Bella chose Edward over him.
Overall, if you're a fan of the books, you will love this movie, even if you were dissatisfied with Twilight. I was immensely pleased with this movie, and will be going to see it again!