This was the most entertaining of the saga so far. I enjoyed it because it was not as moody, and action was mixed in with the romance. The special effects were not bad either. Some things were cut short (for example, the legend of Taha Aki and spirit warriors), and characters had to be cut as well. Imprinting was not explained in full detail and will have to be for "Breaking Dawn" to make sense to fans who will only watch the movies.
My biggest beef was: why do they keep changing the vampires' hair? Vampires are supposed to be frozen, never changing, yet it seems each member of the Cullen family has a different hairstyle in every movie. Yet Bella Swan, who is supposed to be human and changing, looks exactly the same from one film to the next.
I realize many details had to be left out in order to make a two-hour time limit. "Eclipse" was still great, regardless of how it differed from the book.