The first 2-3 seasons are great. And that’s because it’s excellent characters in an unusual situation with just a splash of mystery/paranormal. The end of the show sucks, because they wrote it like they knew where it was leading, but they didn’t. The big reveals are very unsatisfying. Would have been better if they just ended it with no answers and let it develop organically instead of shoe-horning a “this is what it was all leading to” ending into it.