I agree with UM to an extent, especially with the logic that making money doesn't make it a good movie. And sure, the story was lacking or simplistic and all that (and the acting was relatively atrocious), but really, you don't expect a whole lot whenever Michael Bay is involved.
The man is the king of flash, explosions and no substance. I mean, you know what happens when he does try working in a story... Pearl Harbor, anyone?
As far as the movie goes, it's definitely one of those movies of the "leave your brains at the door, or preferably at home" variety. I wasn't a huge fan of the cartoons or toys growing up, yet even the nerdy side came out when Optimus appeared.
I'm normally no fan of Bay's , but this one was at least enjoyable.
The only real disappointment was that they didn't play the original theme song at the end the way the first Spider-man did (at least, I don't remember it did), especially since I waited until the end of the credits for it.