Saw it today and it was really good, i hesitate to call it amazing - for that a few pieces didn't work for me.
I felt the movie rushed through his life pre-Manhattan project, Nolan didn't allow Oppenheimers life to breathe on its own and develop. We didn't get to know him all too well on a personal level i felt, it was more like here's his affair, they fuck and she has mental problems. Then he meets his wife, they hit it off and she gets a lightning fast divorce and they marry etc.
However when the Manhattan Project starts to take shape the movie slows down a little bit ( not much) and develops better, so much better that i was gripped by what was happening onscreen even though i knew the facts already ( even if not all details). It was amazing to see all the legendary scientists of the modern age appear, people that have made groundbreaking discoveries and i don't mean just Einstein. I loved how they were initially just focused on the scientific and engineering problems until they, or rather Oppenheimer, realized what they were unleashing but by the time he was there it was far too late and history would be changed forever.
Since this movie is called Oppenheimer it obviously shouldn't just stop with the first atomic explosion or the use of the bomb on Japan, one of the central issues of the movie was Oppenheimers connection to communism that doomed him later on and his scientist naivety and ignorance of the forces around him makes the parts after the successful development crucial and heartbreaking too.
I also can't remember when i last saw a movie with such a high density of brilliant actors down to the smallest roles, i mean there were Oscar winners who had all but 3-4 minutes of screentime. Murphy knocks it out of the park but so do others as well, chief amongst them Robert Downey Jr. and David Krumholtz ( because i remember him from goofy teenager movies from decades ago and here he absolutely delivers).
Can't wait until this is on streaming to rewatch it.