Let’s keep this simple.
Kick-Ass is a dark comedy about “normal” people who choose to be masked vigilantes.
It’s really funny, the acting is great, it’s very vulgar, and incredibly violent.
The vulgarity and violence are magnified because most of it comes from an 11 year-old girl named Mindy Macready, AKA Hit-Girl (Chloe Moretz).
I liked everyone in this movie (even Nicholas Cage), but Chloe Moretz stole the show, and completely sold her utterly ridiculous character.
If you liked Sin City, or enjoy Quentin Tarantino movies, this is a must see.
If you are easily offended by violence and vulgar language, then skip it.
Some critics didn’t like Kick-Ass, but it seems that most people who do watch it, enjoy it.
The movie is rated R, so don’t bring your kids if they are nightmare prone, or you haven’t taught them some common sense.
The Geek Whisperer 
Screw Ebert. He also said that “Video games can never be art”, so the man’s dead in my book!