I have just finished watching this, it took me 10 days.
Those who gave this 1 star, I get that nothing will be everyone's cup of tea but they simply can't appreciate how brilliantly this has been written & produced. The cinematography is beautifully done.
There is depth to every single character. The music is so well placed and every episode has a slightly different feel to it. It evolves in waves, something is revealed or a change happens but then you get to run with it for a while before you get that feeling somethings not quite right again, it makes you question if you've missed a detail somewhere but then you get an "ohhhhh" moment and everything shifts up another level or sideways. Not once did it feel like they were trying to drag out a story line or worse spew everything out in the final half half of the final episodes of each season. The whole thing ended exactly when it should.
I think this is one of only a hand full of series that I've properly sat & watched every single episode without getting bored or distracted. If I didn't have real world priorities I would happily start watching again because I know it will be even better the second time.