Being an unrelenting non-stop over-the-top explosive melodrama, this movie is one of the worst action flicks ever produced, and utterly unbelievable in every way. The pace is constantly fever-pitched, and all the action and the actors are gripped by total hysteria. It is nigh unwatchable, and a stain - nay, a blotch - on the careers of everyone involved.
The wildly exaggerated attempt at excitement undermines itself, resulting in a movie where you just go "Come on!" all the time. The setting and the events are impossible to take even remotely seriously. I can only rate this abomination a 1 out of 10.
If you want to see a good asteroid movie, see Deep Impact, which is intense, sensitive and thoroughly engrossing. Everything Armageddon is not.