So Thing Number One is that the storytelling is unlike anything else I've ever seen. It's confusing at the beginning -- and frankly, even after having watched the whole thing, there are things that I'm still not entirely clear about -- but somehow it doesn't matter. I found myself saying "I have no idea what is going on, and I have even less idea what's going to happen next, but I can't wait to find out." Plus on a visual / cinematic level, the show does all kinds of bizarro things you've never seen before, and it makes them work.
Thing Number Two is that the acting is amazing. Whoever did the casting for this show deserves an award, because so many of the roles involve playing a wild range or weird mixture of personalities or deeply strange characters or conveying complex thoughts and emotions with little to no dialogue, and if anybody failed to pull it off, the whole thing would fall flat, but everybody just nails it.
Thing Three is... I don't know what it is, because it all happened at a subconscious level for me. It's probably something about the camera angles and the lighting and the sound and all that stuff, but whatever it is, it's really good. Because you'll be watching the show and nothing in particular is happening, and all you can think is something is really, really wrong; something terrible is going to happen and there's no reason at all to think that, except that something unidentifiable is off-kilter. Plus there's all this mental/psychological stuff happening, and a whole lot of it is represented symbolically and never gets explained, but it's plenty clear what it means.
I didn't binge the show because I don't like binge-watching and also because it's a pretty tense show, and sometimes after an episode I'd be like, okay, I'm really looking forward to the next one but that is seriously all I can handle for tonight. But I never once got bored with it.