This is one of the rare movies that I've watched multiple times. And every time I watch, it still has the same powerful effect on me.
Although the action is good, what makes this movie truly great is the message it conveys. After you watch the movie, look out of the window, you will see that the movie is playing in real life. In V's words: "There is something terribly wrong with this country, isn't there? Cruelty and injustice, intolerance and oppression. And where once you had the freedom to object, to think and speak as you saw fit, you now have censors and surveillance coercing your conformity and soliciting submission." That's not what happens with the fictional Britain in the movie. It's happening in the U.S. and Canada.
More than just pointing out the objective reality, the movie will give you a sense of hope. It is really moving to see thousands of people in their V masks marching in unison. It's a powerful force that once released, no government can contain.
So as the Fifth of November is coming, watch the movie and remember that: "People should not be afraid of their governments. Governments should be afraid of their people."