An absolute beast of a film, It is so well made I can not recommend it enough. For anyone who expected it to be a film on the trinity bomb only it would be a bad film, but it was a movie on the life of oppenheimer, which I think nolan grasped pretty well with the little cuts of the ups and downs of his life, It could be considered boring if your attention span is 10 seconds, but for anyone who has even a slight interest in the conversations, the movie is phenomenal, even the part after the bomb where it was just dialogues upon dialogues of security clearance, the movie held its ground well, like i said the movie was about the life of oppenheimer and going through that final hour we were made to feel exactly like he felt, anxious, frustrated and saddened on each betrayal by characters we had bonded with over time and likewise each triumph.
It is one of the best movies I have ever seen, to understand it more clearly i would recommend you watch veritasium's video on oppenheimer since it broadly encompasses the whole movie and it allows you to follow along very well.
Must watch 10/10