They were bad. The first one set the style for the rest of them, which was extremely awkward (in both acting and pacing; at times it seemed forced). The second one was a bit better than the first because of the bigger budget and the "stunningly cardboard" emotionless Bella that Stewart got to play, which meshed well with her limited range of facial expressions.

The third was okay, but it would have been nice to show more of the "bad" vampires' storyline, since those were the only interesting parts. The last one, which was split, somehow still seemed like it was moving too fast, sprinting toward the finale, which was also very lackluster, since none of the actors put enough life into the characters for the viewer to form any sort of attachments to (which is odd and sad with a huge saga). But then again the source material, the last book, read like a 14-year-old's fantasy fan fiction, so...