Many people consider this to be Tool's best cd.  They may think so, but I am sure that Lateralus is the best.  This is, however, definitely an awesome cd, full of great songs, heavy guitars, and Maynard James Keenan's great voice.  Tool always focuses on music before lyrics, which is good and bad, due entirely to the fact that Maynard has quite the voice.  The instrumentals, however, like Danny Carey's complex drumming and Adam Jones' majestic guitar, make the music much better.  Justin Chancellor's bass is great, too, but the others stand out more. This cd has a load of good songs, but the best ones are track 1: Stinkfist, track 7: Hooker With a P*nis, and track 9: Jimmy. The music itself has almost every element of progressive metal thrown into the mix, making everything about it stand out in a good way.  Another thing that some people will notice about Tool is that they don't sound like other bands.  They're music is bounced in good ways, played with much passion, and comes out in a way that sounds so great and makes sure that Tool only sound like themselves.  The best thing about the music is that even the most diehard fan doesn't know what they will do next.  This cd is focused and displays the best that a band can give, so buy it if you like original-sounding rock/metal.