Such an ambitious movie, and I can see why this is held in such high regard. I don't think it's perfect, and especially in the final few minutes I think the tone didn't fully mesh well with the rest of the film. However, everything before that, especially the riot scene, was perfect.
An extremely hollow and amateurish commentary on the idolization of the past and how nostalgia blinds us from the truth. It's colorful and over-stylized without any real purpose, the screenplay is embarrasingly bad, and the direction this movie goes completely ruined any hopes I had for this to be good. Some sequences were shot and directed well, and the soundtrack was really good (like all the other Edgar Wright movies I've seen). Even though it's less accessible, a movie like Mulholland Drive delivers on a similar premise not only way more subtly but also more tastefully, so I'd recommend watching that instead.
I literally have no words for this masterpiece. It's not only Coppola's greatest film, but one of the greatest achievements to come out of American cinema. It's a war film that is able to be more than just a film and delves deeper into the human mind than I ever thought it would. An instant favorite.