20 plus years ago I had the honor of meeting show runner Balthasar Kormakur here in the states and then later in Iceland. The Icelandic government was trying to pitch him as the new Bergman. He certainly wasn't that but his work had it's own qualities that were great. So it was a surprise to see his name on this series after not hearing anything about him for so long.
The show is really engaging and certainly unusual due to the setting of a nearly abandoned town slowly getting covered in volcanic ash. Some parts of Iceland look like another planet in normal times but the addition of an active volcano really pushes the unreality to another level. I wonder how much of this is taking advantage of circumstance and how much has been created by a special effects team.
While the pacing might be slow to some people, it's not out of line with other Scandinavian series or movies. The characters are all interesting and lead me to wonder how I would fare if presented with this same situation.
I have called this an Icelandic Solaris. If you are not familiar with the Tarkovsky film or the book it came from, I will not get into spoilers trying to explain that. For those who are familiar with those works, you'll see what I'm talking about but that will not diminish your enjoyment of this series. One fair warning; the series ends not where you would expect it if this were made in the United States and might be upsetting to some.