Absolutely phenomenal. It truly does justice to the history behind Robert Oppenheimer's story, the Trinity Test, and the Manhatten project. As a kid who loves theoretical physics, it was amazing to see so many celebrated scientists such as Einstein, Richard Feynman, Hans Bethe, Hiesenberg and Bohr all on a giant silver screen.
For a film which is mostly only three hours of intense dialouge, Nolan does an excellent job in fully immersing his audience into the history he is presenting. The cast was simply outstanding and present each figure almost perfectly. For anyone willing to let their minds play around with the abstract and with a topic embedded in the natural world around us, from physics to morality, go watch this film.