Much of what previous reviewers have written is accurate. The movie is a bit too long and some good editing would have improved it overall. The acting is ok, the special effects are fine, and the dialog is ok.
Top marks for originality. I liked that best.
It is better than much of the crap coming out of Hollywood. I think a an excellent director could copy this movie and make a great Sci-Fi flick by improving the dialog, using better actors, and having better drama direction.
Overall a nice movie from Russia.