This film has absolutely no crossover appeal. The whole point of it isn't to recap the last 8 years of Mitt Romney's life. It's to show the human side of him and the toll that it took on his family. It's pretty affective too at some points, like when we see how good of a wife that Ann Romney is behind the scenes, telling her husband to have conviction from his heart.
There's a few really intimate moments that you should watch out for which tug at the heart strings, but they never really quite tug in a really strong way. You won't cry, you want laugh, but you will smile. This is strictly a documentary for politicos.
One problem a cinephile might have is the really bad quality of half the shots. Some of them are extremely grainy like you're watching a youtube video. The score sucks, too. And the overall atmosphere that the film creates makes you want to fall asleep.
In conclusion, if you're not obsessed with politics, stay away. It's boring.