T3 was much better than the second one. My only complaints would be that the beginning kind of dragged on, but that was because the story had to be set up, so it was forgiveable, and the spinning camera pans started to make me dizzy. Seriously, spinning around aa building while going up is not the best idea.
Anyway, it ended a little upbruptly, but besides what I already said, it was good. Hopefully a fourth Transformers isn't made because it just isn't neccesary. Overall, I was satisfied with it.