This is one of the best television shows i have seen. It really makes you care for all the characters. The story goes on smoothly and there is no point in this series where you'll feel bored. All the character arcs are well done.
And even one of the greatest authors, Stephen King, recommended this show. So it is definitely worth the watch.
I was hooked from the first episode itself.
Sometimes, shows don't do well in their successive seasons but this show just went a level higher in every episode.