I really loved this show from the very 1st episode, it was very rare to see something so slow and intense, really moving, something completely different from the trend. Then, when I started to watch season 4 I was shocked, how they ruined this show is unbelievable. I understand that the decision to cancel the show was sudden, so the writers I hope had difficulties to find an ending that was at the level of the previous season. Anyway, for me the evaluation has to be bad, would be a 9 up to 3rd season, a 0 for the 4th.