I'll watch anything with Daniel Brühl.
I was a little wary 20 minutes in, but they did a decent job of keeping things in perspective. My biggest quibble was the subplot with the commando and his dancer girlfriend. What was that about?
I don't think it needed to just be a documentary, no reason not to fictionalize historical events if it makes a good film. Whether this was a good film or not is another question.