I've read the book twice and seen all the film/tv versions(and I include "Clueless" in that)that I know of. As a book I would say it is both superb and comparable(in quality) to "Pride and Prejudice" and "Sense and sensibility" so since books are usually better than their adaptations the film has a lot to live up to.
Well this is very well done. The film will stand or fall on the quality of its Emma and Gwyneth Paltrow does an excellent job. It's a difficult role as she has to be annoying, at times, while never actually making you lose all sympathy. There is a key scene, which I won't spoil by describing to you, where Mr Knightley has cause to chide Emma for her behaviour and this is done perfectly, as are all the crucial scenes. The supporting cast is excellent as you would expect, and while any film version will require some cutting and a little inventiveness with dialogue, I feel It has all been done as well as it could be.
I would say that the ITV Drama version starring Kate Beckinsale is good, and manages to squeeze in some extra scenes,so I can understand if people already familiar with that version prefer it(and maybe it's a little more patriotic to do so) but I must say that I can't fault this Emma.
It is one of those rare films that upon each watching has left me with an unexpectedly warm glow of pleasure inside.