I love it. Huge Dateline fan.
Contra the "top review", I think it's an inspired telling. I was surprised by Keith Morrison's narration but it's a bold move that works better than it should. It does an effective job of creating a hybrid of the Dateline roots and a dramatic re-telling. That reviewer wanted a "traditional drama" - this is bolder than that. It's a prestige re-enactment.
For me, the dark humor and the slight camp are a perfect fit for the story. Some people may find it offensive. That's fine, but likely hypocritical unless you are personally affected by this case. There is so much entertainment filled with senseless death and violence, I think it's odd to criticize a show that is at least showing sympathetic victims and the utter immorality of a sociopath - even if with a darkly humorous take.
RZ is fantastic. Duhamel gives the best performance I've ever seen him give in anything. Judy Greer is fantastic in everything she does, no surprise she is here too.
Familiar with the story, not necessarily a fan of RZ, I put off watching the first episode. It far exceeded expectations - currently quite underrated with a 6.1 IMDB rating. I know the story very well and am still very eager for the next episode.