I love that film! I don't feel that it portrays Chopin terribly accurately -- he has absolutely no sense of humour, no cattiness, no mischievousness (is that even a word?) or really anything much except impeccable manners, an easily-offended system of morals and his G minor Ballade.
But, even though I've managed to make it sound rubbish, it really isn't. If you take it for what it is you'll probably really enjoy it. It's a lovely feel-good film, and despite its historical liberties, it's a lot of fun to "see" Chopin, Liszt, Sand, Marie d'Agoult etc. I think it's great.
Jas