It is easy to just say, "This is a classic."What makes it the classic is the formula and people (Directed by Howard Hawks). There is the standard 50'sw sci-fi prolog. You are set up as they go to investigate a crash in the snow. The investigators hold hands in the snow to figure out the size of the downed plane under the ice and find it has a peculiar shape. From there you know it can only get better.
Do not expect the book story. Nevertheless, do expect blood, fire, and sinister doings. There are naïve scientists, dubious airmen, and a generator running out of fuel.
By the way, while you are at it just whose side is Dr. Arthur Carrington on?
And does Nikki just scream a lot or does she usually bring up the true nature of the threat?
Any way you slice it or dice it this movie holds its own up against the bug pictures like "THEM!"