I will be taking my entire family to see this one on the 4th.
And as a person who is both highly critical of movies, and had extremely high expectations for the live-action movie made-from-his-childhood-dreams - I enjoyed it very very much.
I will give no spoilers. But Optimus, aside from a new paint scheme, completely *is* Optimus.
My only qualm was the fact that the movie could be classified as a very elaborate commercial for General Motors. However, given that the entire original show was a thinly veiled advertisement for the toys - I guess I can't really be too critical there.
Oh, and Megan Fox is, well, a fox.