I do not usually leave reviews because there are so many other reviewers that can do a much better job than I. However, there is one aspect of this series that I feel deserves credit. I am sure that everyone has watched shows that feature the same characters over different time periods or parents and siblings. It seems as if filmmakers give no thought to the natural aging of people when it comes to portraying the passage of time. They give even less thought to casting actors that resemble each other as family members. Do they think that we do not notice that the actor portraying the child at age 10 has curly hair, while the actor portraying the same character at age 20 has straight hair and a widow's peak? These types of things can distract from the narrative.
I have watched a lot of movies. A few years ago I started keeping a list of movies that I have seen. The current count is 1,362. This series takes place between two periods of time, 20 or so years apart. When they cast the actors to play the children in the earlier years and the same characters as young adults, they chose actors with striking resemblances to each other. Even more amazing, was the way they dealt with the adults from both time periods played by the same actors. I have no idea how they did it, but they aged them flawlessly. In all of the movies and television shows that I have watched, I have never observed such seamless attention to detail regarding the aging of characters.
This show is quite good, but the technical achievements are fantastic. I do not understand the other reviews speaking of the "slow burn" pacing. The series is only six episodes long with each episode running about 50 minutes. That is nothing.