It's not so easy to review a band like Meshuggah, because there's not much to compare them to. Of course musically they come from the tradition of death metal, with the customary growled vocals, detuned (mostly) guitars and frenetic drumming. But Meshuggah Have really pushed the envelope in terms of developing a progressive sound where the vocals become an accompaniment to the music, rather than vice versa.
This album bristles with musical ideas, time changes and a plethora of hypnotically mechanical rhythms. But more than that, it is a sustained assault on the ears. The hoarsely shouted vocals (you'll need the lyric sheet) pale beside the butal onslaught of the guitar and drums. Yet this is a precision attack, an exercise in controlled aggression.
If I have a criticism of this album (and I do) it must be the lack of light and shade. Where there is the occasional quiet passage in the music it can only be a short prelude to an outbreak of redoubled ferocity.
If you're a fan of virtuoso musicianship that takes the metal genre into new areas you need to buy this album. If you think music should be about tunes and songs, or something you could possibly dance to, it's best avoided.