I saw Valkyrie. I enjoyed the movie and would watch it again. But I don't think Cruise was very convincing, he almost never is. Too American playboy like. Russell Crowe or Liam Neilson would have been great for that role. Also the movie moved along too fast.
I agree. He was not suited at all for that role. Poor casting. I think they were looking for a big name from a marketing aspect, but he was not too believable.
From a historical perspective, I wish they would have gave more of a role to General Tresckow (He's the one at the end with the grenade in the forest). He was actually the mastermind behind all the assasinations attempts, even though they all failed. Also, General Beck, who was the older general who shot himself, actually failed to kill himself as the bullet graised his head. The SS later interogated him and tortured him and later hung him.
The two hour documentary I saw was fantastic. I believe it was in the history or military channel. It has some of Von Stauffenburg's sons speaking.