After much searching I was very pleased to be able to get a video copy of this film (through Amazon) so that I could watch it with my Mum who saw the film when she was about 13, and had often mentioned it to me as a good film. She was mad about Van Johnson at the time.
For it's time, the flying sequences / effects are actually not bad, and the "heaven" scenes remind me very much in places of "A matter of Life and Death", (which I love). I love the image of the two men striding across a misty open space / heaven. The transition between earth and heaven is subtly done, for the time.
It is a little slow maybe by todays standards, and of course there is the hint of a little wartime "propaganda", but actually this is more about the everyman-type values they felt they were fighting for, and that's understandable for the time.
On the whole, it is well written, and the end is genuinely moving.
Also the female role is mostly strong and gutsy, and recognises the essential back-up role of women during the last war, which makes a very pleasant change.