If you're already onboard and dying to see "The Twilight Saga: Breaking Dawn, Part I," then just go. Enjoy the movie. Have fun, and don't bother reading this review. There's no point. And I don't begrudge you that at all. If you love the books and you just want to see the film version of the story you already know, I'm sure you'll be delighted, and if you haven't liked the films so far, I don't think this is going to radically change your mind.
For the rest of you, here's what I wrote at the end of my review for "The Twilight Saga: Eclipse":
I find myself in an interesting position as we face down the prospect of "The Twilight Saga: Breaking Dawn," because I like and respect Bill Condon as a filmmaker. I think he's got good taste. I think he's made really strong films so far as a director. I think he's worth paying attention to, and I think he's got a real taste for genre material that he hasn't really indulged since he went mainstream. He's a smart guy, a writer first, and I think he knows how to shape difficult material for the screen. And yet, I truly believe that "Twilight" is worthless as source material. I do not believe there is a filmmaker alive who could manage the impossible feat of creating a faithful adaptation of Meyer's book and also making a good movie. Going into the home stretch, I think this is one of the worst blockbuster franchises of all time, inept from start to finish, and getting worse as they go. There will come a time when we look back on these films and wonder what sort of mob insanity drove their success, and we will laugh and shake our heads and pretend they were never really that popular.
I will say this for the new film… you cannot accuse it of being all tease and no delivery (pun fully intended), which was one of the main dramatic issues with both "New Moon" and "Eclipse." This is a movie that begins with a big event, ends with a big event, and which expends tons of energy trying to convince us that every single thing that happens in-between is also a VERY BIG EVENT. This is almost too rushed, a breakneck ride that doesn't feel like any of the other films.