I watched the film because of kbruestle's annihilating comment.
From the 3rd episode I liked the film, although it contains some unnecessary scenes with dying fish.
The characters are played well (could'nt see it in french), the ambient is only a little creepy, the music is present but not annoying and after episode 3 I wanted so see episode 4 and so on.
I do not regret to spend 5 hours viewing.
For me, it's another interpretation of perhaps the best crime novel ever. It's worth looking at.