10/10, my favorite on the album and one of my top 3 Maiden songs of all time (Clairvoyant and Revelations being the other two, I think... today). To me this is the quintessential Maiden sound - it's got points in the song made for the crowd to chant AND to sing along, it's about freedom and liberty, it captures the essence of its subject (the show) perfectly, and the music is stellar and driving.. realistically, I don't think I could hear this on any other album that they've made, stylistically. So it fits the subject and its times.
I would have loved to have seen this live. The live version from "Maiden England" is as good as the original (even though Bruce cracks on the high bit at the end), and I even, at home singing along, sing Adrian Smith's "I'm a free MAAAAN!" from Maiden England. That just seems to me to have even more punch than the original.
Which leads me to a question for fellow IM fans - when was the last time they played Prisoner in concert, and are there any commercially available (i.e. not bootlegs) version of this live available?