I saw it yesterday and really liked it. I didn't even realise it had that guy from One Direction in it; turned out that he's a far better actor than I'd have given him credit for. The only real issue I had with it was the storytelling being somewhat jilted: it covers three characters (or sets of characters; the infantrymen, a father and son, and a trio of Spitfire pilots) over different periods of time with them all connecting at the end, but it can be difficult to keep track of the time differences between them and the differing amount of time that's elapsed.