This short review is about the quality of this BFI release of Seven Samurai, not the actual film which in itself is worthy of five stars. The print used by the BFI for this Blu-ray has not been remastered, there is a lot of damage and scratches inherent in the print and the blacks look very grey.
Extras are lacklustre, an interview and trailer is all you get. If you really want to enjoy this film in Hi-def then purchase the Criterion edition from the USA. It blows the BFI edition out of the water in terms of picture quality and extras, see below:
New, restored high-definition digital transfer, with the original uncompressed monaural soundtrack and an optional DTS-HD Master Audio soundtrack on the Blu-ray edition
Two audio commentaries, one featuring film scholars David Desser, Joan Mellen, Stephen Prince, Tony Rayns, and Donald Richie, and the other Japanese film expert Michael Jeck
Fifty-minute documentary on the making of Seven Samurai, created as part of the Toho Masterworks series Akira Kurosawa: It Is Wonderful to Create
My Life in Cinema, a two-hour video conversation from 1993 between directors Akira Kurosawa and Nagisa Oshima
Seven Samurai: Origins and Influences, a documentary looking at the samurai traditions and films that helped shape Kurosawa’s masterpiece
Theatrical trailers and teaser
Gallery of rare posters, behind-the scenes photos, and production stills
New and improved English subtitle translation
PLUS: A booklet featuring essays by Kenneth Turan, Peter Cowie, Philip Kemp, Peggy Chiao, Alain Silver, Stuart Galbraith, Arthur Penn, and Sidney Lumet and an interview with Toshiro Mifune from 1993.
You will need a multi-region player to play the Criterion edition. Here's the amazon link for it: