I didn't expect the ending, I have to say, and found it powerful and extremely moving. Like another commentator, I was surprised that no-one in the audience left straight away at the end - like my wife and me, they may well have been composing themselves and drying their tears before going back out into the real world.
I was especially impressed by the two young actors, Asa Butterfield and Jack Scanlon, who I thought were superb. All credit too, to the director for getting those performances out of them.
If I had the power, I would make everybody see this film.