I watched the first two episodes, and the ending of the second was sufficiently annoying to dissuade me from watching any more. Which may have been a mistake: I did like the grubby, Soviet bloc, eternally 1974 aesthetic of Besźel, Mandeep Dhillon’s sweary constable, and the way they presented the inability/unwillingness of the inhabitants of one city to see the other.
I was initially confused by the subplot about the lead character’s missing (dead?) wife, as I didn’t remember that from the novel, but it turns out they added that for the adaptation.