Everyone should see it just to support the movement.
I saw it and it was fine. Parts were chillingly on-point relative to the demogoguery coming from The Empty Suit.
My only gripe, and it's a very small gripe, is that they didn't give Francisco 3-5 minutes to fully flesh out his actions at San Sebastian Mines.
IMO, to fully comprehend what's going on, reading the novel beforehand is a necessity. That's why my wife wants to see it again. She's never read the book, and could not understand my excitement prior to attending the movie.
Will she read it? That's to be determined.
You'd be surprised at the people who didn't know when John Galt appeared on the screen. I thought that was beautifully done. He's there on page one (to 699), but is not actually introduced until page 700. How does a screenwriter deal with that?
Again, I'll admit my bias, but this is a really deep movie. If it hangs around long enough, there will be plenty of people returning for a second or third visit.
Watch out for the DVD sales!