I was thinking the same thing as I was reading the responses.
An absolutely perfect horror flick. The acting is great, the plot is frightening and credible, the pacing of the movie is perfect, the special effects were revolutionary.
Not only that but the isolated "cut-off" environment of being all alone out in the middle of the Artic and the claustophobia of being confined in that tiny little research station created a very spooky mood and atmosphere. John Carpenter really did an outstanding job with that movie.