Seriously, Transformers is one of the best action movies I've seen in a long time. If you're an 80's child I recommend it even more, you surely grew up with Transformers as part of your childhood.
The movie is packed with action from beginning to end and the story is pretty good too. In addition to all the awesome fighting scenes, the slick transformations for both the Autobots and Decepticons, the movie is full of comedy. Whenever there is character or plot development, you will be on the edge of your seat or cracking up. Sam, the main human character just has something that makes him hilarious. Without giving any of the movie away, I strongly recommend you go watch it.
I have to admit that the only thing I didn't like about the movie is the blatant attempt by Chevy, GMC, and other companies to make this movie a 2-hour advertisement. You'll see what I'm talking about when you go see it. I noticed this right away and I just kinda made a mental note and tried to put it aside to enjoy the film.
Oh yeah, and Megan Fox is freaking hot. That's the hot girl you see with Sam most of the movie. Hot hot hot.