In reply to Welsh Kate:
I enjoyed the way that the mission profile was very much how 633 Squadron had planned for things to go, and that kept my alertness up for Things Going Wrong (especially in the training), given how devil-may-care 633 was about casualties
Of course, I then had the fun of explaining 633 Squadron to the rest of my movie group (mainly in their mid 30s...)
Oh, and it had mountains!
IMO a fine movie (and certainly one for the big screen).