I watched the movie because my wife wanted to. But later I was glad that I did it. Though the story is basically very well clear from the trailers itself but the directors and actors have done to keep the interest going throughout the movie. Superb acting by Akshay Kumar and rest of the crew. The movie seems a bit boring, and I believe some facts and scenarios have been added to create the "masala" element in the movie.
In short, a good experience. Its a story, and one which is true! So you may decide to know about it or may not know about it.