I watched this movie a week ago, i think. I got interested with the title, but until i finished the movie, i didn't realised it's based on Princess Diana. Now that i've read all of your posts, hmm... there're lots of similarities.
I don't really like the woman who plays Princess Armelle (or the Diana in this case) but, due to the great plot-line, i think all of the aspects blend it pretty well.
Compared to other royal movies (like Prince & Me), this movie has certainly done some research. The sashes, palaces, gala dresses, tiaras, or the fashion style looks really real. There's a lot of elegant fashion styles here. and thank goodness no "crown queen" title, haha....
The plot makes the movie quite funny. I guess that's what a woman should do when her husband is really being a jerk. Don't yell or make strong arguing.. but, plot something behind your husband back. haha...
However, i'm quite surprised to see the ending where Armelle died. How ironic!
and oh..
here's the IMDB link.