One thing I can say about this song on Keys is that it's not for the faint of heart...
Personally, I play the keyboard on the guitar because there are no PS3 keyboards in Canada. Anyway, on the guitar this song is an absolute beast with some intense chord sections mixed up with some really fun hammeron/pulloff sections. Amazingly, the song is never repetitive at all in it's entire 8:33 duration. it just bounces from one pattern to another and none of them are boring.
Be wary though: this song can be somewhat painful to keep up with using a guitar unless you like 1-3-5, 1-2-5, or 1-4-5 chords (which are outlawed on guitar and bass for that reason.)
Seriously though, one of the most fun songs on keys so far. solid 5/5