Just watched it. The more I think about it, the better it gets.
It's so artfully done, but you never get the sense that Christopher Nolan is selling you "Art". It manages to be refreshingly simple in its delivery - there are no Hollywood heroics, no over-the-top action set pieces, and no deliberate sentimentality. The commitment to unvarnished realism is exceptional. The dogfight sequences are a standout in all their intensity and frustration.
And yet at the same time it establishes its own heightened reality, an abstract place removed from the real world, where the whole of existence is a beach and an ocean. The cinematography and score do an incredible job in painting this picture, as well as the deliberate absence of enemy combatants (dissociated further by never being referred to as Germans but rather the "enemy").
Watch this on the biggest screen you can. It's worth it.