I saw this on Saturday, I've seen the first one which was alright, I haven't read the books.
I thought the first half of the film was great and does a good job of making you really hate the entire regime and feel very sorry for those in the Districts.
I have to admit though that the twist towards the end was a huge let down, it was sort of like "Oh... that was easy", and although I don't know what is coming in the final film, it seems like she has a huge helping hand now.