Overall Look: The overall look of this film is very interesting. I think the director and DP chose to use neutral colors so that it sets the mood. The DP was very innovated on the use of camera movement and the way the lens was masked. I found it was interesting that the director chose to show a little more than a quarter of the first part of the movie in first person using an POV than clearly showing the main character.
Images: When the main character is reminiscing on his past the films look changes to illustrate he is imaging his past in his head. The use of the old style of film and double exposures made this look possible, it gave it the texture and colors to show the viewer the difference between reality(in a diegetic sense) and his thoughts and memories. When the main character first wakes up the use of a very shallow depth of field on a POV shot showed that his vision wasn't all the way there, it sends the message to the viewer that this guy is freaking out.
Shot Lengths: Depending on the scene of the movie the shot lengths helped show the intensity of the scene. When he first wakes us the shots going in and out showing that he's barely gaining consensus. The long shots of the talks he has with his past lovers and friends show the subtleties of the scene.
(P.S. I would have thought shot lengths had to do with editing)
Shot Types: In the first half of the movie it showed a lot of close ups and medium shots from a POV style angle. Once the main characters clearly shown the style changes to broader shot types. Using long shots, close ups, and extreme close ups.
Camera Angles: The movie showed a lot of POV shots from a low angles looking up. This put the viewer in the main characters perspective, looking up at everyone because of the condition he's in. I enjoyed the use of reflections in the movies camera angeles, very creative and visually interesting.
Composition: The film used the rule of thirds very well, it made the shots interesting. Even when it was in a POV perspective the shots were very well composed.
Camera Movement: The first part of the film and all the POV shots had the movement of the main characters eye. The film did use dolly, tilts and pan shots.
Cinematography Style: The cinematography is all intentional, it's telling a story in a more visually interesting way. Using noticeable cinematography is a tool to tell the story, show and create feeling.