Overall, really enjoyed the movie. The entire premise of the book is disturbing, so it's advised that you come to terms with it or don't go see the movie. The first half of the film (or about that) is setting things up - Katniss and Gale's relationship, life in district 12, the Reaping - a lot of detail is left out understandably, but you get the idea. All the main characters are well cast - amazingly so. There are some differences from the book to the movie, but nothing that alters the story terribly. I was impressed with the actually killing scenes, as I worried what they would actually show. They were not gory or as detailed as in the book, and while the scenes are bloody (just the thought of children killing children, and some of them seemingly enjoying it is creepy and awful), no scene dwelled on the killings. Even the opening of the Games, where it is really a bloodbath is handled with quick camera shots that give you the idea without dwelling on it.
I think they could have spent more time setting up the relationship between the capitol and the districts. My husband, who never read the books, didn't understand why they were all so colorful. And I had to explain to my son that the people in the capitol's children don't participate in the Reaping, which is one reason why they see it as a fun sporting event. Gruesome concept. I may have liked it better if Katniss were narrating it. All in all, great movie. Scary, thought provoking, sad. My kids are 9 & 11, and they handled it well and enjoyed it. However, I don't think it's for every 9 & 11 year old - I think parents need to really decide if they think their own kids can handle it.