On the road to Berlin (2015) obviously has a rather meager budget compared to modern, even Russian, war movies, which necessarily isn't a bad thing but hinders some of the effect of this film.
Plot is rather run-of-the-mill tale of friendship, chaos of war and bravery - and it is hardly surprising that the film is based on a short story/previous Soviet war film. Especially Lt. Ogarkov as a character seems a bit implausible in his actions. Also the love story-bit seems slightly inserted, to the point of being a trope. Despite this, the interplay between two main characters - the condemned and his Kazakh guard - works. Especially Amir Abdykalov as somber private does a fine performance. And I have to say I haven't seen many central Asian roles cast in any war films portraying the European Eastern front despite the fact that the Red Army fielded plenty of soldiers from there, often in quite subordinate roles.
Visually speaking low budget unfortunately shows in the two grand battle scenes which come out as unintentionally comical - a better solution would've been simply shoot them so that the viewer doesn't see so much of the awkward props from the smoke and chaos.
Fortunately the film makers don't dwell on combat, but emphasize the strong points of cinematography - beautiful sense of "being there" when it comes to Russian summer. Lush forests, fields, misty riverbanks and small villages of the countryside translate marvelously to the film.