I've seen a few episodes and it's quite similar to Vampire Knight, a popular manga by Matsuri Hino, from 2005. This seems to be a grown-up version of the story, mixed with American and British elements. It turned out pretty okay.

Both A Discovery of Witches and Vampire Knight take place in a town with gorgeous old stone buildings and roads, with non-human creatures in disguise around every corner. Discovery of Witches starts at a college with the main character living on campus, while Vampire Knight took place at a boarding school. In A Discovery of Witches, we have a female witch whose parents were involved in a mysterious incident, and who develops curious powers. She's now connected to a book kept in a library, with some missing pages. A similar female character and book were also featured in Vampire Knight. In both stories, the lead male character is a vampire who's insanely attracted to the main girl and "craves" her, but his main urge is to protect the girl and do good for his own species after he did "some things" in his very long past. Both stories feature the idea that vampires can access the memories of a person as they drink their blood, and can erase memories. Both also feature a high council of non-human creatures and the fight against that council by our main characters. Records of non-human creatures' past are kept in a special library, yes, you guessed right, in both stories...The similarities are definitely there. One thing I'm not fond of is, in both stories, sexuality is mixed with vampires drinking blood from others. I guess most people like that? In spite of that, decent show. The acting is okay, special effects are okay-ish, surroundings are magnificent. One could give a try.