Nate - Did you see it on an IMAX screen? We went to the showing at the Udvar-Hazy Air & Space museum and it was pretty spectacular.
I liked the movie and understood why they did what they did to the timeline, but as a devoted trekie, I was a little upset that they changed so much. It did leave a clean slate for any future movies, but I don't know why they felt they needed to rewrite history.
Rebarnmom - I don't know about your daughter, but there were was one particular bug related scene that would have completely freaked out Ryleigh (she's 8). I think 12 is probably a good cut off age, unless your child is fairly mature.
Kaz