I believe it to be a thoughtful, well-made film that will change many views of Darwin held by the public—for the good. The acting is strong, the visuals are wonderful, and it treats with loving care the Victorian details of the furnishings at Down house and other sites (such as Malvern), and the local church.The film focuses not directly on the writing of The Origin, but instead on Darwin's relationship with his devout wife Emma, which by every account I've read was uncommonly tender. Roger Ebert makes some remarks, too, though he's waiting on a full review until the film is released. Which, unfortunately, hasn't been arranged yet in the States. I think it looks really good, and it'll be a crying shame if it doesn't arrive stateside during the year of the Darwin Bicentenary.
Via GrrlScientist, who links to more reviews and the movie's website [flash].