I saw it today. Pretty to look at, especially the air sequences.
However, almost zero character development.
The old guy on the boat was most interesting character but even he didn't have much to do.
(Tom Hardy was good but once again he spends most of the film wearing a mask!)
The CGI was pretty good but the ship bombing sequences were just bad.
I did like the way they cut around in the time line to fit the story together.
But in trying to "personalize" the events I feel he failed to capture the scale of the event.
There were hundreds of planes, ships, thousands of troops, etc. that just didn't appear on the screen.
It was worth seeing but I wouldn't consider it a classic. It was no Longest Day or Bridge Too Far.
He avoided most of the war movie cliches but Chris Nolan could have used some help with the script.
But, I'm quite a WWII buff and I'm always super-critical of war films.