I just saw it tonight. My first thought was "frak this movie was long!" After that though, I have to say I enjoyed it, probably more than the others really. The only thing I really wasn't too sure about was Prime himself. For all the years of him being an unwavering paragon of all that is good no matter how much of a disadvantage that put him at, it was "discomforting" to see him take on this almost murderous mindset (I lost track of how many times he said he was going to kill someone). I don't know that I've ever even heard him use the "k-word" in any iteration of Transformers. That's not necessarily bad, cause I have a feeling the writers wanted that affect.
The humans were more bearable this time around. I guess I never realized how bad Shia Labeouf, Megan Fox, and the others really were until this movie. Really sucked watching Ratchet get torn up, but I guess they needed to make room for the new bots like Hound.
And then of course, how do you beat Optimus Prime riding a dinosaur/bot waving a sword around?! I mean that sold me on the movie from the get-go, no matter how much everything else might suck.
So again, overall, I liked it a lot more than the previous ones. I just wish about an hour-and-a-half in they'd have an intermission.....my stomach still hurts.