I didn't vote for this one, but I ended up reading Carmilla and the one that I did vote for...this one was better! So it was a good win.
I enjoyed the whole book, though when I finished it I liked it considerably less than I thought I would during the beginning and middle. Loved the atmosphere created, it was rich and very visual, though only somewhat spooky to me (being far more jaded, perhaps, than his original audience). I felt the characters were engaging and believable, in the main.
However,the story didn't end well for me partly because it somehow seemed rushed or maybe I just wanted more material dealing with unraveling the mystery, finding the culprit, and so on.
But the real buzz kill for me was his vampire paradigm...I mean, really?
I've read a lot of vampire books, and each one has a slant on the origins, rules for walking among humans, how to kill, etc., but this version just didn't hold up to common sense (did I just say vampires and common sense in the same sentence?!). So that downgraded my mental rating quite a bit.
That said, I would probably read it again because I liked the place that LeFanu took me to. I would just have to be better prepared to part company at the end.