I traveled from Dallas TX to see it on the 24th.

All the superlatives you read above and explanations of why they are not hyperbole are all true. There is nothing like "Napoleon" as presented on these occasions in these RARE A-list circumstances.
Part of what makes this amazing is that the subject, Napoleon, is not something most people, myself included, would go out of their way to see, but you are roped in very quickly none-the-less and by the end of the movie you are wishing you could go join up. This is "Napoleon: the early years" before he went to the dark side. This is Napoleon, the Dream.
Part of it is that you know that it's all really there. Except for a few miniatures and maybe a few matte paintings it's all real and you are gobsmacked by the knowledge that Gance somehow assembled all this in front of a camera without drowning or trampling or killing anyone. This isn't a CG army of Orcs that can be directed with mouse-clicks, these are real mobs
Part of it is that it looks so different from other films of that time. There's an enormous amount of hand-held camera footage doing crazy viewpoint stuff. Honestly, some of it looked a bit too much like home movies.
It has no "stars" that we remember and yet they all do a great job.
When it's funny, it's FUNNY, when it's sad it's HEARTBREAKING, when it's exciting it's AMAZING. How often do you get a film by anyone that is all that?
The presentation with a large live orchestra is essential. It can never be as loud as a modern theater sound system but the fact that they are there is daring in a way that a recorded soundtrack can never be. I also noted that the acoustics of the Paramount Theater were surprisingly good. Apparently the Oakland East Bay Symphony also plays its regular concert series in that venue, although not "in the pit".
It occurs to me that one advantage a silent movie has over a "talkie" is that the music doesn't have to be dimmed down while someone is "speaking". Napoleon has an extended speech at the end but the music never needs to recede while he's doing it.
And then the "Polyvision" finale... is beyond anything I've ever seen and I have seen a real Cinerama movie too which is about the only thing similar.
Technically, the Polyvision was very rough, the panoramic images never quite line up, but what he does with it in terms of montages and superimpositions and plain wild spectacle is so powerful that none of that matters. I can't imagine how he was able to conceive it all in a time when non-linear editing just didn't exist. Obviously a very powerful brain at work.
I went to see "The Artist" last night. A fine movie and well-done homage to silent film.
But "The Artist" is a 90 minute modern recreation of a warm campfire you might enjoy roasting marshmallows over. "Napoleon" is a five and a half hour thermonuclear blast somehow created with stone knives and bearskins that you are thrilled to be blown away by.
After you've seen "Napoleon" like I've seen it, all movies will be trifles from here on out.
I spent $800 on this trip to see a movie, a rare extravagance for me, and I don't regret a penny of it. (well, maybe the $18 I spent on the SF Museum of Modern Art the next day. Mostly crap.)
IF you are planning a European vacation and the rumored 2013 screening in London is a reality I would recommend targeting that date.