I've seen the movie three times now, and I love it. Some parts don't stand up to the 'oh, really' test, but it's a sci-fantasy movie with sentient alien robots that split their lives between humanoid bipedal forms and mechanical conveyances like semi trucks and Chevrolets--what do you expect?
If anyone has the chance to see it in 4DX, you should definitely go for it: water and smoke effects, the chairs move with camera overflights, rattles and shakes of fighting--when Ratchet gets stabbed, the seat back punches you in the kidney. It's worth the $18 ticket price.
Awesome transformation effects, great fight scenes, very cool cinematography, great sound, Optimus riding a T-Rex: the best of the series.