if you're into the old school godzilla look. They actually color corrected the film to be black and white. They went in and graded each shot so the black and white worked for every shot. They didn't just adjust the saturation levels on it.
It worth it watching both ways. But Amazon only seems to have the Japanese with English subtitles. Which, is the way I prefer it anyway.
Anyway, don't walk, run to see this if you haven't already.