The actors were wonderful, the cinematography was excellent as wwre the special effects, but the writing could have been better
SPOILERS:
Was was there never any rain in seasons 2 and 3? How come mists and dog had no deadly effects? Why were 10 of the 11 scientist in that small lab space with Rasmus when the sample was being extracted? It was things like that that I found irritating. It was still good enough that I binged it all but I was left unsatisfied by the last episode of season 3.