Huge Nolan fan -- I adore this film. I saw it in a college theatre where my friend studying counter terrorism and I were dumbfounded. It's very underrated and is, if not, one of his greatest works. Nolan showed the film first, privately to a group of wwII veterans to get their feedback on mechanics and accuracy, and I read it helped many war veterans cry and process their trauma for the first time. Veterans said it was the most accurate depiction of what they'd gone through that they had ever seen. His overt use of sound also entrenches the audience with the realities of sound trauma and how war PTSD happens. We don't necessarily feel a strong bond with the characters but the gut wrenching feelings we are left with for the soldiers' fight for survival are equivalent if not a more unforgettable experience. It is a dreadful love letter.