Just saw this today, and I have to say, I enjoyed it. The first half was fucking awesome imo, felt it kind of went a little south in the second half. Was so happy to see Soundwave too lol.
The FXs were awesome, really seemless and damn life-like. I was really impressed with them.
Overall, I give it a 4/5. (And damn is that new Camaro hot.)
On a side note, I had to sit next to like 7 or so 15yr olds, were really annoying before the lights went down. Lol, one of the girls actually turned to me and said, "I'm going to apologize in advance for our behavior." However, they actually shut up and were model movie-goers, I was surprised lol.