As expected, the film is almost entirely build-up to the final scene. Everyone who has ever seen a Star Wars film knows the ending to Rogue One. Something that amazed me about this film was the freshness of the story. The film seemed more original than The Force Awakens, which acts as a recycled story from previous films in the main series. In fact, I might claim that I enjoyed this film even more than The Force Awakens because I was able to predict the ending, but couldn't predict the execution. Rogue One makes it clear that no matter how predictable the story might be, different directors can still create fresh takes on certain events in the world of Star Wars.
Oh, and one more awesome thing about Rogue One: Darth Vader. Lord Vader returns to the big screen in one of the most epic scenes of 2016. The movie is a bit long, clocking in at 2 hours and 15 minutes. Still, it is worth it for the ending. I would gladly sit through the whole thing once again just to make it to the ending. In short, Darth Vader makes this movie worth the $10-$15 dollar outing. I waited a long time to see it, but I am sure glad I got a chance to catch it in Cinemark's XD format on the big screen.
(I wasn't paid to say that, I am genuinely glad I saw it there)
The Bottom Line: Rogue One isn't an original Star Wars story, rather it's an original take on an old Star Wars story.