Watched this one about a month ago. Was really surprised by how good it was. It honestly might be one of the best anime series I've watched. Been spending the last few months just going through a bunch of anime and was getting kinda tired of watching action and fantasy anime and was looking for something different. I regularly see this one get mentioned in comments sections, on best current/recent anime lists, and I often scroll past it when perusing Crunchyroll's library, and finally decided to check it out. As I said before, it really surprised me just how good the show is. Very grounded -- despite its supernatural hook -- and mature with more on its mind than slice-of-life hijinks. It's pretty funny at times, but also pretty fuckin emotional. Also has some excellent animation.
I'd definitely rank this one in my top ten for best anime. Really hoping for a second season.