Here's one of the very best, 1950s, Sci-Fi films. This one and "The Forbidden Planet" topped them all for quality and production values. It's definitely the best adaptation of H.G. Wells's classic of the Martian invasion of Earth. I had a conventional DVD of this one but I wanted a hi-def copy. I skipped over the Blu-ray and went for the 4K as the 4K version was very price competitive. It's sharp & brilliant. That's just how I like my movies.