It's a very slow paced examination of an intriguing premise - the dead come back, not as ghouls or vampires, but as healthy versions of themselves at the moment of death. A little bit like the premise of 'Miracle Day' in microcosm, without the action/thriller tropes.
It definitely has it's problems. The government agency does a lot of arbitrary and stupid things because, well, they are a plot device, not characters to be examined. This would be a lot less disconcerting were the rest of the show not so concentrated an examination of how people react when confronted with the previously unthinkable.
I find the bigotry allusions disconcerting, in that the people branded as 'unnatural' clearly are unnatural. I presume the writers want us to side against the bigots here as we would against racists and phobics, but part of me can't help wondering if the argument works as well as a justification of such things in the mundane world. Clearly not what's intended, as all of the main characters are on the anti bigotry side - I think that's just lazy writing.
Still and all, a quieter, gentler zombie (not ghoul for once) series without the blood and gore.