Just saw it and loved it. I love semi-ambiguous endings and it was really well-paced overall. The emotional parts were CRUSHING and the tense parts were fuuuucking tense. It's weird to watch a modern movie where you actually give a .... about what happens to the characters. Recurring themes like the poem, finding out the story with his ex, how everyone develops (before....well, yeah), finding the will to live - even just out of the pure utility of it after considering suicide - etc.
Also Liam goddamn Neeson.