We have the Criterion edition. It has a few special features, but we didn't watch any of them.
It's online in pieces. part 1:
part 2, part 3, part 4, part 5, part 6, part 7, part 8, part 9
Moria gives it 4 stars. Slant Magazine has a review. The New York Times says,
It might be termed a morality play, so direct and uncomplicated is it. But for all its directness and simplicity—its barrenness of plot and perplexities—it is far from an easy picture to watch...
Senses of Cinema says,
Bergman's film stands almost as an archetypal film version of this “story”, and shows us how so-called ordinary, civilised people can be reduced to carrying out acts of barbarism similar to those of the criminals who committed terrible acts against them.
10/12/2009: Classic-Horror.com has a review.