The movie starts well. You might be waiting for the part from synopsis which says that a look-alike takes over, but the initial character development of Madeline does help set the tone of how important the job is for Madeline. Her transformation from less confident to dealing with a difficult problem is nicely sketched.
There is a weird scene in the movie, where friend of Madeline, asks Madeline to take pics of her and then later when she looks at the snap, she says, "I look so blotchy" and proceeds to fix her photo, even though Madeline repeatedly clarifies that she looks fine. This is weird because this scene is highlighted and it creates a feeling that later in the plot, it might show you that her friend was involved somehow. Anyways, that what I thought.
5 is for good cinematography. Could have been better with some more skip-the-beat thrills.