Wherein we realize that well-known doesn't equal great.
This song is, to the average non-Maiden fan, the most accessible and well-recognized song, and that's great. It's simple and strong and driving, and pretty good for what it is, a single. But that being said, there are some incredible flaws in it, including some stereotypically bad Steve Harris lyrics and a lack of enough verses to make the song a bit more in-depth. I waver between a 7 and an 8, but I'll go with the 8/10.