Considering the grisly end of Madalyn Murray O'Hair's life, it's hard to see how a biopic about her could have been done much differently, without the tone changing drastically. Indeed the ending, though well known, is hard to watch. This is neither a great film nor a bad one. In fact, considering the nearly universally acknowledged unlikeability of Madalyn, there is a surprising amount of effort to humanize her, especially during scenes where there were no living witnesses to report the interactions. From all that I have read and all of O'Hair's TV appearances I saw during her life, this is a pretty accurate portrait of the woman.