In this particular movie there are only two things that I see as pros: it's the camera operator's work and the atmosphere of fear, chaos, and uncertainty. All the rest aspects, such as plot or characters, are just sadness embodied.
To put it simply, this movie is just stuffed with various bits of Lithuanian history after WWII, when Soviet Union occupied the country. Partisan movement, mass deportation to Siberia, collaboration, conformity... These are the topics that "Owl Mountain" tries to cover. And fails miserably. The main reason of this failure are dozens of different characters, each having their own line that you are forced to follow, even though you cannot remember their names anymore - it's just that there's too much of them! The idea of showing the afterwar period through the eyes of multiple characters is great, but executed in the worst way possible, leaving the viewer tangled in a bundle of untracable storylines.
The characters themselves are pretty bland. Even the main one, a young partisan, is just a good looking guy on the screen, but totally empty as a protagonist. Actors who played their roles in this movie were either confident and knew what to do in the set, either totally lost and completely unfit to work with the camera. There's no inbetween.
There were lots of errors of facts (from historical and linguistic point of view), that made this movie barely watchable. But the main thing that put me off the most was unecessary sex scenes that took away from this movie more, than gave something. Either they were used as an attempt to deny a popular soviet-era anecdote, that there was no sex in the Soviet Union, or it was just a clever marketing trick for young people, because, as we all know, sex sells.
To sum this review, the trailer of this motion-picture basically shows all the best bits that it has to offer. The rest are just boring fillers, and it's up to you if you want to suffer through two hours of very mediocre Lithuanian history lesson.