This is not a masterpiece, but not at all bad either. I bought this on Blu-ray because it is shot in ''Schwiizertüütsch'' (spiced with some French) and a genre piece at that. The Blu-ray contains English subtitles.
To avoid unnecessary confusion for the viewer it is good to know that the beginning and the end of the film are set in ''the present day'' while the rest in between is set in 1975. Events in 1975 are not told in strict chronological order. To clarify things toward the ending (which is considerably faster paced than the beginning of the movie) two recap sequences are inserted.
The screenplay is perhaps overcomplicated, containing several crossing storylines. In hindsight quite a lot in the course of events depends on coincidences plus the fact that several characters are unable or unwilling to speak. Still, everything comes together neatly.
The present-day sequences, especially the one at the beginning, unnecessarily add to the confusion. They could have been left out without harming the story. I suspect they are there only to provide a final twist, but this could have been done just as well by moving the entire present-day part to the end, as a kind of epilogue.
In conclusion, this is an interesting picture. A bit confusing at times, but to that there is a perfect solution: watch it all over again.
The Blu-ray contains a making-of, information on the shooting locations and a German-dubbed soundtrack as well. Oh, and nice music overall. I liked the Serge Gainsbourg song that at some point breaks the action.