This cd is Tool's best cd by far.  They are constantly keeping up with different styles of music that they can use in their cd's.  All of the songs on this cd rock, I can't choose just a few.  The song that made me buy this cd was Aenima, and then the rest of the songs on this cd grew on me.  Pick this cd up if you are open-minded on music, but beware, this cd may not be for music fans that like only the type of music that Metallica, KoRn, Limp Bizkit, or other hard Rock bands make.