The other reviewer Bobby Smith has given a very good account of this film. It is not an action war movie (it is set after the WWII) but the DVD cover would have you think otherwise, which is unfortunate but not the fault of the film makers.
This is suppose to be a true story and I feel it is up to one small point, the 'search' for the SS members out of a group of 51 German Prisoners of War is a sub plot around the romance and intimacies. These grow between the German prisoners and thier all female Russian guards. There is a small however, it was pretty common knowledge that most SS (and some Wehrmacht)men had thier blood groups tattoed on thier left arms (for medical purposes). So a quick check could have solved the mystery, but toward the end of the war this practice became the exception to the rule, so its not really a 'deal breaker'. Only other gripe is that they all speak English albeit with reasonably good accents, but it tends to take away from the reality in that language would have been a barrier to communication at the beginning unless in the real true story they were all bi lingual, a petty gripe I know especially as I actually wasn't in the mood for a sub titled film.
All that aside the acting is excellent from all concerned especially Thomas Kretchman, Malkovich is just Malkovich which is always enough and he does help ratchet up the tension. There are enough twists to keep the plot moving at an unnoticably reasoned pace and as such it passes the test of all good films in that you don't feel bored or check your watch. If you like plots with intrigue and a genuine attempt to make a non Hollywood style film then you will enjoy In Tranzit.