Frankly, I have watched only two short extracts of Part 1 as I could not bear to watch the whole part. In the 1st extract I was surprised to see that Natasha Rostova was a blue-eyed blonde, below medium height (according to the book, Natasha was a tall brunette). And Pierre Bezukhov was a thin man! (a 'massive', overweight man - according to the book). In the 2nd extract (I guess, it was the end of Part 1), I was shocked to see Bolkonsky and Rostova waltzing to the music which was composed by A.Khachaturian in 1940's (i.e. about 150 years after the events described in the book!!!). I doubt if the movie-makers ever read the book. The movie may be alright only for the American audience :-)
Review of War and Peace
