WE (Lee and I) have to agree with Janis. We watched the film Friday night, and thought it was extremely well done.
I have to admit, after reading a few posts here, I watched with trepidation, but that finally gave out when I actually gave the film a chance.
My husband is extremely well-versed in this time period, and said it was very accurate, and even stated to his sister and I, that Tom Cruise looked very much like Claus von Stauffenberg.
We didn't mind the fact that Tom Cruise didn't have a German accent, for the majority of the actors DIDN'T. We too liked the subtle change from the German into American, which acclimated the audience.
So, two thumbs up from the two of us. Would definitely recommend to all. 
Lee was also impressed they didn't get into the gore of the torture and executions, but rather told a very good story.
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"