This is one of the few movies of the last two decades that brought me to tears at the reveal towards the end. Once it hits you, you'll look back at the entire movie in a different mindset and it's emotionally jarring. It also helps not having read the source story.
Don't know if you have but may I recommend reading the original novel from Ted Chiang named "Story of your life"? It's a bit different from the movie but still incredibly mind bending.
Also, any novel from the collection "Story of your life and others"[1] is worth reading and thinking about. Ted Chiang is an exceptional writer.
