Five years after they last thrilled us with songs like The Grudge and Lateralus, TOOL is back. In their latest offering, 10, 000 Days, TOOL displays their continuing growth as a band as they explore very deep, personal subject matter and combine is with musicianship that is second to none. Starting with the disc's first single, Vicarious, TOOL assaults the listener with a sound that one would not believe to be produced by a simple band of four musicians. But these musicians are not your everyday bunch. As always, there are a few "filler" tracks that serve to bridge the songs in what seems to be a concept album of sorts, and while they may not serve much of a musical purpose, they do work to aid in the continuity of the album, particularly in the case of Lost Keys with preludges to Rosetta Stoned, a song which will go down as one of TOOL's most intense ever. And, to top is all off, 10, 000 Days packaging includes incredible artwork that can be viewed through the provided set of stereoscopic lenses, which help to complete this total assault on the senses.