I decided to check this show out because it's on Shudder. It should be noted, however, that this show is fantasy, not horror. I never read any of the Twilight books or watched the movies, and this show has been called "Twilight for adults" and "Twilight for nerds". It's very slow and somewhat lacking in dramatic intensity. However, I still plan to watch the second season to see if it improves. The second season looks more interesting than the first one was because the second one takes place in Elizabethan England. If you want to watch a great show about witches that actually has horror content, watch Chilling Adventures of Sabrina instead.

Update: the second season seems much more promising than the first because the setting has moved to Elizabethan England. The Season 2 premiere is reminiscent of Outlander. Due to this significant improvement, I am changing my rating from 5 out of 10 to 7 out of 10.