It's like Tremors, in the sense that the writing, the continuity and the pace are all PERFECT. There's is not one unnecessary scene in the entire movie, and no stupid love interest sub plot either. In fact The Thing is the only movie I can think of, off the top of my head, that features absolutely no women in the cast. And that's not me being sexist here I'm just pointing out that Carpenter always made the movies he wanted to make. The Thing was about a bunch of men in an isolated research station, and the subsequent disaster, there was no need to add in a female character just to provide some kind of distraction.
Also the effects, not a drop of CGI because CGI didn't exist and the effects still look good today, 30 years after it was made.
Honestly, for those who haven't seen it and like claustrophobic horror movies, you should watch it RIGHT FRIGGIN NOW.