I was fortunate enough to see this film at the Toronto Film Festival and talk briefly with the Director afterwards.
"The Heart of Me" is a period piece set in London during the 1930s and 40s. It is a European-style film that takes the time to give exposition and background to the characters. It builds slowly and chooses substance over style. The mood is somber and much of the lighting and colour scheme reflects this in a similar manner to the Crow.
It is a drama with a few moments of levity. The three main leads are excellent. Helena Bonham Carter and Olivia Williams play sisters. Helena's character begins to fall in love with her brother-in-law played by Paul Bettany and they have an affair.
I was pleasantly surprised by Paul's acting. I've only seen him before in "A Knight's Tale" and "A Beautiful Mind" where he has played light-hearted best friend characters. His performance here was understated, subdued, and a change of pace from what I had previously seen. I didn't think he was capable of going head to head with Helena but he was.
If you like Merchant and Ivory films, then I think you would like this. It has the same feel as "Howard's End" and "Remains of the Day".