I went to see Maleficent and I loved it! It is a great fantasy movie that has the classic elements like fairies, dragons, castles, knights, and magic.
This movie focuses on Maleficent's back story. It's not Aurora's story; that was in Sleeping Beauty. In this one, we learn more about who Maleficent is, and what made her become the evil sorceress.
Remember that this is a new interpretation of Maleficent's story. Just because a person may love Disney's 1959 animated version, it doesn't mean they can't love this one as well. Keep in mind that even that version did not follow the source material. Keep an open mind and enjoy it for great storytelling, a beautiful setting, and fantastic acting.