I thought this film was pretty good. All of the main cast did great jobs, but Julianne Moore definitely stood out. It was like she became Palin.
I also think that the film didn't slam Palin necessarily, though it didn't lionize her either. I agree that it portrayed a woman out of her depth, essentially a caring person but also one with an ego and insecurities. What was a bit chilling about the film was watching her descent into egomania.
I was also chilled by John McCain's unwillingness to keep Palin in check. His own desire to win at all cost could've put a person clearly unready to succeed him as President.