This is a terrific older sci-fi movie. It has all the elements to make it a sold movie; a good variety of characters, an interesting plot, and a solid script. The great special effects are just icing on the cake. Much of the movie is told in documentary style with a voice-over of someone, which adds to the realism.
You can feel connected with the main characters and what goes on in the movie. Even most of the characters that don't have much of a role seem realistic, not two-dimensional (like some in Spider-man). The plot has many viable twists and the movie comes to a exciting and feasible conclusion (un-like Independence Day). Many/most people will find it more entertaining than the "classic" sci-fi invasion movie War of the Worlds.
This movie, even though it was a relatively mid-budget movie made in the 1950's, should serve as a message to modern day Hollywood. It shows how a movie if made with a lot of thought and heart, as opposed to just violence and/or sensualism, can produce a real winner.