It could not be better in any film review upon this biographic film and masterpiece!! As for me, like other Tarkovsky's films, it is of time span, life circle, dream, personal gain or loss, happiness or struggle in historical segments...... Yes, it is complicated and profound if you gaze at the techniques of film, such as the slow motion or elevation of status through actress' walking . Or, you will soon focus on the common feelings of human being shown on screen, like childhood memories and stream of consciousness in daily life. I cannot help watching it twice.