It is a far superior album to Powerslave. I believe that album to vastly overrated in the IM and metal community.Well, I figure I'll add this too and I really hate saying it but now that riff has, I don't feel so bad.
Number Of The Beast is the most overrated Maiden album on the planet. Every time I see a top metal album list it's right there. Maybe it's the over exposure in the live shows because NOTB and HBTN are mandatory. I don't know. It's my least favorite of the 80's Bruce albums.