The CGI, the story, the human characters and of course the robots.
If you're a fan of the original cartoon series then you will be a fan of the movie. Some elements from the original story have been changed but that in no way detracts from the movies excitement.

From the opening helicopter attack at the airforce base to the final battle in the city the action is unrelentless.

I would recommend this movie to anyone who has a love for good old fashioned rumbles. Even the transformation are spectacular. The highlight would have to be Optimus Primes transformation when he is squaring off against Megatron.

Shia Lebouf puts heart and soul into his role and makes it believable for the audience. Megan Fox is good eye candy but also had a good role. Anthony Anderson was a little wasted as far as comic relief. John Turturro does a far better job in that department.

Overall, I know that many people don't like Michael Bay and what he does with his movies but here, in this movie, his style of direction fits the bill to a tee! Bring on the sequel!