It's more of the same for experimental complex-Rock weirdos The Mars Volta and that's far from a bad thing. 

The third full-length release from the group (or duo, as Omar Rodriguez-Lopez and Cedric Bixler-Zavala are the wizards behind the curtain), could just have easily been disc two of 2005s Frances The Mute.  Long, intricate intros, outros and in-betweenos fused with Prog-Rock style guitar work and semi-Spanish tinged melodic vocals. 

It's nothing unusual for a Mars Volta track to tip over the ten minute mark, and there are three such examples here (along with several others that just fall short), which for a seasoned listener, is an indication something beautiful is about to happen.  'Tetragrammaton' is a perfect example:  A 16 minute, 40 second rollercoaster ride through wailing guitar, drum-riddled highs and faint, creepy lows; it'll have you reaching for the volume to hear it one minute and reaching for it again to crank it the next. 

If you don't have much time to dedicate to your first listen - then leave it until you do Amputechture, like the releases before it, has profoundly more impact if you submerge yourself for longer periods of time, if not the whole album.