We saw it, and I didn't think it was very bad. My kids are 8 and 10 and had no problems with the movie.
One of the reasons for the PG-13 rating is because Anakin kills "younglings" at the Jedi Temple, but he killed kids in episode 2 also.
Also at the end, Anakin looks pretty gross after he gets burned up.
It doesn't have any stupid kid stuff like the Ewoks or Jar Jar Binks, but I was okay with that.
That doesn't too bad.