2-2.5. There is an undeniable charm to it, and Julia Roberts gives a great performance as the titular character. Her facial acting during the opera scene is particularly noteworthy. That being said, as others have mentioned, it kind of glosses over serious issues in favor of being what it is. It's not easy to leave being a prostitute behind, and the topic doesn't quite mesh with the Cinderella/Pygmalion model here.
We want this to be a beautiful story. We do. But this is where all the battles should be fought, in terms of sexism and gender roles. This movie relates to the scene in Eyes Wide Shut, when Tom Cruise's character is with a prostitute. By "contrast" to what he was about to do, he decides that he is a good guy. Here, the good guy is just someone hiring a prostitute. In both cases, the prostitute served a purpose.(cont)