as before, I have to ask: overrated by whom?
By outsiders, non-hardcore, non-metal fans? Well, I'm not sure what those people like but expect the only songs by Iron Maiden they are likely to have heard are Run to the Hills, Number of the Beast, Can I play with madness, and maybe Bring your daughter. Of these, I think Bring your daughter is by far the worse though I suspect no one rates that song very highly so it can't exactly be overrated. CIPWM is, I grant, a pretty crappy song that does appear to be popular among lukewarm metal fans. Between the other two, I agree with others that neither deserves to be counted among Maiden's best tracks. They are both good, but not great and they don't deserve their fame.
By members of this forum? "Educated Fool." I can't stand that song but it has a pretty fucking high rating on this board. I still can't figure out why!