Wasn't sure what to expect from this series as it has quite a few great reviews, and quite a few bad (which mostly complain that its slow and boring). Well, I watched it anyway and Glad I did.
I thought it was one of the better Mystery / Sci-fi thrillers I've seen in quite a while. I don't really consider it Horror, but it is very suspenseful, creepy, and a bit anxiety inducing. I love creepy cult movies, and lots of Victorian architecture, artworks, and sculpture eye candy and Long Creepy Labyrinthian Hallways and eerie basements and such. So scored quite a few points from me just for that. I love Dante's Inferno too.
If you have the focus and attention span of a Mayfly, then this is NOT for you. If your a person who grew up in the 60's and 70's as a kid and are used to tension being built up slowly, then you May well enjoy this like I did.
I just binged 1st season and Loved it and Hope they get a season 2. Can't wait. ;D.
I actually enjoyed the actors, and while I didn't recognize a lot of the actors, seeing Matt McGorry as a secondary character and comic relief was quite fun.
So, if your unsure still, give the 1st episode a chance. You may well find a new series to add to your future watchlist. :D.