It takes a long time to save the world in "Transformers: Dark of the Moon." This special effects-driven, 3-D extravaganza does not know when to quit. Indeed, it's a lengthy summer blockbuster that will keep you in a dark movie theater for much of the summer.
There's no denying that the movie possesses a lot of entertainment value, but there's also no denying that director Michael Bay savors every explosion in a plot that blows something up every few minutes. It's a noisy spectacle that has no use for restraint.
That's really too bad, because a shorter running time would have made this more of an escapist treat.
The story itself is so basic that...