In terms of watchability I guess I give it a 6 based on acting and visual interest.

I watched it on Netflix so perhaps if I'd paid to go to see it at the pictures I'd have scored it lower.

I concur with a lot of the other reviews here, it just doesn't capture the magnitude or desperation of Dunkirk. It's just a beach evacuation in some war.

A lot of reviews complain about the lack of character development, but for me that's one of the most thought provoking aspects of the film. It was about the reality of war, not a story about characters in a war. The same "story" was happening to everyone, and reflects the emotional detachment of accepting the senseless death of a best friend in the same way as someone you've never met. And treating someone you've never met as a friend.

But while I like to have my thoughts provoked, I don't like to be forced to try and understand what the hell is going on. It jumps around all over the place, in a very disjointed manner.

This isn't helped by the flawed plot mechanisms which just leave you thinking that doesn't make sense, that wouldn't have happened, that's just silly and unrealistic. I always wonder why the actors or film crew didn't point these out during filming?

So in conclusion, it's an average film about a war complete with the plot holes associated with average films. I'd say it's worth a watch, but don't have high expectations and you'll enjoy it more.