To that end, while Marie Antoinette is not the most historically accurate film (it's told through a very modern lens, with modern language, music, and other influences), it is visually stunning. Two other movies, The Duchess and The Young Victoria, have a similar feel to them, but nothing is as spectacular as Versailles.
For anyone unfamiliar with the basic story, while America was fighting for their independence, a movement was simultaneously growing in France to protest the opulent and disinterested monarchy. Versailles was a grown-up theme park with frequent parties and bountiful leisure activities. The movie is set on this backdrop. While angry crowds protest at the gates of the palace grounds, Marie wades her way through trying to learn how to be a Parisian princess, early marriage with a stranger, and eventually becoming queen.
Despite the heavy subject matter, the movie doesn't feel heavy until the very end as Marie and her family leaves Versaille. And if you know anything about history, then you know where she is headed.

After everything, though, the movie's plot is not spectacular. The acting is not spectacular. If anything, it's all mildly entertaining enough so that you'll be amused, but not completely blown away. What really makes the movie is the scenery and the costumes. You can oooooo and aaaaaahhhh all you want and not feel guilty about it or spend thousands on a trip to France to get the real thing. And while you may not get much much obvious inspiration with the decor and clothing (because really, why were 2 foot high wigs ever in fashion?), but you will find some inspiration here and there if you know where to look.