Because this film doesn't appear to have been made for viewing by the public at large, it's very hard to rate it. Instead, I assume that it was a Hollywood film meant as a training aid to show flight crews the importance of keeping quiet and recognizing various means the enemy might use to interrogate them. I am not sure how true all the scenarios are, though they seemed way too subtle and nice for Nazis. I assume in reality, if the Germans really wanted to get these secrets they would probably just torture it out of them. However, soldiers needed to be aware of the mind games that might be played and the consequences to America fliers if they gabbed to their captors.
When seen today, the movie is quite fascinating for historical reasons. Plus, it's neat to see some stars in various roles (such as Kent Smith as a Nazi as well as Arthur Kennedy and Don Porter as American fliers). Considering I am an old movie fan AND a history teacher, it's natural I'd enjoy it. However, even for NORMAL folks, it's pretty entertaining and worth a look.