You're going to read a lot of reviews about why this film is so great, and they're all true. Easily, for me, the best movie of the franchise. So, let me skip right ahead to my take as a parent.
To be honest, I’m a little surprised this movie escaped an R rating. With Bryan Singer pushing lines in every MPAA (Motion Picture Association of America) category, you might get a bit annoyed wondering how this movie is deemed appropriate for 13-year-olds while movies like “The King’s Speech” are only appropriate for those 17 and above. Nudity, occasionally brutal violence, and a very defined F-bomb, this is definitely a movie parents should watch before they decide what's best for their kids.
That said, if I were running the world, I’d give this movie a PG-15+ with some sort of disclaimer about how subjective my opinion is and how you as a parent know what’s best for your child.