Well, let's not forget we are talking Russian cinema here. That means we are not having Hollywood budget, but we have a good story telling and experience making War movies. Anyways, the story is interesting, with enough twists to make a good suspense. The acting is also good, the main characters are convincing. You really need to know the language, or have some good subs to be "in check" with everything. You are not going to find Hollywood action scenes with explosions and effects, but besides that, everything else is good. I may squeeze the movie in 6 to 8 parts, but that's only an opinion. See it and judge it for your self. Overall good new Russian movie.
