Loved the first season, second season lost its way but still had gorgeous atmosphere and enough action to make you want to hold on. Sean Bean and number of the other cast give great performances, personally I think the character of Joseph Nightingale was awful to watch but that has more to do with the writing than the acting (honestly expected him to be a redshirt and die within a few episodes, also "falling in love" with a very young girl you've just met and know nothing about is weird and problematic). If you like a good period horror with some tasty literary references than you'll love it, but don't get too hyped just sit back and enjoy it as it is.
Review of The Frankenstein Chronicles
