Seeing them one after the other is great because it's interesting to see the different styles of directing, lighting, feel, mood, etc. Continuity was great! Eclipse is wonderful. Very different from the others. Felt good to see Edward in so much more of the movie and Rob did a good job of expanding his emotional range with this script.
I've only seen it once, and I plan to see it a bunch more times. Some of the special effects were a little cheesy, and it seemed a little rough in places, but look past the few flaws and it's a really good movie, especially when you consider the paltry 37 million they had to make it. Box office returns were so good the first day that Summit announced on the following day that they will be making the next book in the saga, New Moon, into a movie too.