Actually, I really wasn't a fan at all to be honest.
The acting was pretty awful in areas, not made easier by the terrible accents, and when they did talk in their 'native' language it's actually the wrong one. Adding the Polish love interest seemed like a cheap way of trying to smooth over some of the more dodgy aspects of the story imo.
The action scenes were well done, but obviously massivley over dramatised to make them more interesting for the viewer.
I must admit, I wasn't thrilled when I heard this film was being made, but I hoped the director would atleast handle it well. IMO, he really didn't. Completely ignored the issues regarding the war crimes, changed big bits of the story to distance the 'characters' from it and then threw in a nice bit of Hollywood style story telling to finish it off.
To be fair, it's an ok done film, but you would have to be high to call it historically accurate, and when dealing with subjects like this there really is no excuse for parting with the facts.