This show is quite terrifying and groundbreaking not just because of jump scares it has to offer but because of an exceptionally well written story that completely do justice with how characters develop throughout the journey. The environment, background scores and its unique way of storytelling are some of the key aspects which make this show unique and scintillating to watch. Jump scares also do their job quite effectively, for example.. one of the instance when Shirley and Theo are on their way to Hill House to save Luke and all of a sudden Nell's ghost appears to prevent them from fighting and so on.
The way with which each episode progresses with back and forth time jumps from present to past and vice versa is quite intelligently done by the makers. This show is going to have its own cult following in future.