Every track on this album sounds like it has been worked on for years to perfection; and it's paid off. I wasn't a big fan of Tool before I heard this album, and it totally changed my outlook on the band and on music.
In my opinion, to truely experience this album you need to read through the lyrics and try understand how deep they go [e.g. Parabol and Parabola].
The instrument work on this album is amazing too, everything seems to work seemlessly together.
It seems that Frankpoole can't recognise a masterpiece when he hears one, his loss.