I saw this, eventually. I really enjoyed it - well-paced, well-acted, with just enough insight and speculation to inspire a degree of intrigue (for a story already well documented) and empathy for the (not entirely empathetic) women involved.
I loved the friendship/romance between Kayla (Robbie) and Jess (McKinnon) but felt Jess got off a bit lightly for basically saying to Kayla "don't talk to me about your awful experience with Roger Ailes, it's better that I don't know". She didn't deserve the kindness Kayla continued to show her after that.
All 3 of the main cast were pretty well served but I felt Megyn's character was the only one whose psyche wasn't explored much or at all. Theron did a great job despite/considering that.
8/10