I saw it Saturday night. Excellent movie. One of the best I have seen in a long time. I would highly recommend it any Turtles fan. It's a children's movie so there are no controversial subjects or anything, but they aren't afraid to show guns and stuff ether. The plot is surprisingly good. There are a couple of good action sequences. It's just an all around great movie.
I only had two complaints. The first is that I wish Michelangelo and Donatello had bigger parts. I know that traditionally Michelangelo has been a primarily comic-relief character, but I thought that he should have had at least a little bit more serious role. As for Donatello, you hardly even notice him.
The other complaint is that I wish the final fight scene would have been more fight and less scene. After the fight between two other characters whom I won't name for risk of spoiling the movie, I was expecting the final fight scene to be like a Bruce Lee movie, but it wasn't.
That was easily one of the best movies I've seen in a long time. I give it 9/10.