One of the daunting challenges of committing a classic title such as Anna Karenina to film is that it already has an adoring community of fans who, aside from interpreting the story according to their personal sensibilities, cultivate established ideas of how the characters look, how they talk, and how they behave. Therefore any interpretation, however sublime, will have criticism heaped upon it, mostly by fans who will reiterate that the book is better.
That said, the 2012 re-telling by Joe Wright (Atonement, Pride and Prejudice) deserves praise, as well as multiple viewings, if only for the benefit of catching the many subtle nuances embedded into the film.
Most noteworthy is the decision to portray the world of Anna Karenina as existing within the artificial confines of an ornate but obsolescent theater, which serves as a metaphor for the Russian aristocracy. To a subtler extent it also symbolizes the restrictive societal norms that women have to endure. This "picture book" perspective created highly stylized acting and almost aseptic scenes, making minute details appear bombastic - the eviscerated railway worker, the suggestive hand movements of the dance, the euthanizing of a prized horse. In the absence of sweeping vistas, the closeups become the highlights of the screen.
Whether by acting genius or directorial skill, or both, the performances are superb. Apart from the delivery of her lines as Anna Karenina, Keira Knightley's minimal lip movements transform her character from an infatuated young woman to a grand dame of substance within seconds. Matthew Macfadyen demonstrated acting range with his portrayal of Stiva Oblonsky. I pay him high compliment by saying that his performance conjures up a younger but no less zealous Jim Broadbent.
Ultimately, was the film able to tell the story worthy of Tolstoy? I think that some literati purists will consider making room for this interpretation, while the more casual audience will marvel at the glimpse of a Russian classic afforded them.