The series, directed by Guillermo del Toro (whom I'm a huge fan of), premiered on Sunday night. I personally thought the premiere was great. Ephraim is an instantly likable character, the plot is intriguing using a suspenseful sci-fi/horror take on a conventional monster story, the creatures are a bit different from traditional vampires in an interesting way, the pacing is just right, and the over all production is excellent.
Just looked this up - I can already tell it will be right up my street. I'm in need of a new horror series after Penny Dreadful has ended. Found out a local network has picked this up to air in autumn in my country, so I'll wait til then. The only thing that worries me is that it's based on a novel and comic. Hopefully they stay true to their source and don't skip out on many important/good bits lol.
Well, you don't have to worry much about them being faithful -- Guillermo del Toro is one of the authors of the original novel lol.