A film version could not have contained all the depth and nuance of the book, and so I wasn't expecting that. I felt that something was lost in the translation, mainly because the book is so textured and the act of transfering it to screen obviously meant some layers were lost. Clare's passionate side was somewhat muted, and she was depicted as a little too mumsy for my taste, where I had always seen her as a fiery but grounded person.
The two main actors were well cast as Jessi rightly says, and the film focused mostly on the love aspects rather than the intricacies of Henry's 'condition', but a choice well made I felt. It's a film about a complex relationship with feelings over action, but I think worth a viewing.