iesb.net posted an interview with Kristen Stewart.

Q: How was the work on New Moon?
Kristen: I had a really good time on this movie. It was intense. Just because of the nature of the story, it goes in a completely different direction. We undermine the first film. We establish a very ideological love and basically tell our main protagonist that she was wrong. It’s like, “Where’s our story?” Edward’s not there.
What I really love about New Moon is that you see this girl build herself back up and, by the time she makes this rash decision to spend eternity with a vampire, she’s in a position where you actually believe her. You’re like, “Okay, you’re old enough and mature enough to know. You’ve lived life.” She grows up.

Q: What was it like working with Bryce Dallas Howard on Eclipse?
Kristen: Really good. Bryce is scary. She’s really oddly sweet as well. It’s funny to see her switch back and forth. But, for Bella, Victoria is an ever-present fear. Even when Victoria isn’t around, Bella is scared that she’s coming back. Bryce is such a good actress and it was easy to be scared of her.

Full interview here