Great film, powerful and moving. It ranges somewhere between "A Single Man" and "Tree of Life" and definitely belongs into the "Arthouse"-section. If you enjoy slow-paced, poetic storytelling and are not opposed to the odd figurative metaphor this is definitely a good tip.
Anyway, at first I was frustrated because I didn't understand a lot of the dialogue. But the subtitles distracted me from the scenes and so I turned them off. I only realized about half-way through the film that it was really quite unimportant what they were talking about. It was the mood that counted, the emotions and the dynamics between the characters. To me, their emotional journey was beautifully illustrated and underlined by the gradual loss of their luggage - their worldly possessions, so to say - and artificial means of help, leaving them literally on their own with barely anything besides their naked emotions in the end, and here only the stuff that really mattered. I think one can safely say that the film truly "boils down" to its ending. Here I have to say that ALL actors were brilliant. The breathtaking Benedict Cumberbatch might have had the leading role and the most screen time in total but EVERYBODY did a fantastic job at showing the conflicting emotions that occur in this kind of situation. I also thought that everything was pretty realistic, thanks to a fabulous script. The anger, being envious of the people around you for the time they still have, the regret and bitterness but also the peace and the feeling of security that comes with knowing your destination are all feelings that one can relate to.
Besides, the film was beautifully shot and edited. The quiet pictures of the sea or of birds wheeling overhead alternating with the scenes of emotional tension, the soundtrack... it all fitted together perfectly. Anyway, prepare a big box of tissues if you plan to sit through this one. BC's performance will break your heart.