The recap of British politics of the Thatcher era was interesting, and seemed to bring up the issues that are currently being debated. Do you solve economic downturns and low employment through austerity? Do you tax the poor at an effectively higher rate than the rich? We don't know yet.
In the film, the real drama was in the 24 hour time of the frame story: the life and memories of very elderly Margaret Thatcher on one day in November, 2008, as she sees the Mumbai Massacre events on her TV, and as many similar events of her life, along with other events, flash back in her mind. The memories are vividly and literally recreated as relatively brief onscreen vignettes for the movie viewer. The result is the kind of unity of drama -- the classic kind.
I knew nothing about this film before we went; somehow I hadn't read a single review. So it was all the more impressive. Though I didn't and don't like some of Thatcher's policies and politics, I have a lot of respect for how she led her country, for her determination, and for her success in overcoming prejudice against her (as a woman and a grocer's daughter). The film reinforced that respect. All in all, it's quite worth seeing.