Instrumental guitar rock tends to fall into two categories - you're either an eccentric genius like Steve Vai or a more substantial player like Satriani. Carlos Saura seems to be closer to the latter, but on the edge of creating a niche of his own.
His proficiency on the guitar is really commendable, but even moreso is the songwriting. Instrumental guitar albums tend to get a bit difficult if they go on too long - however, 21 minutes of high quality and consistent songwriting makes listing a pleasure. Only 2 of the albums 4 tracks are fret-shredding rock, the other two show Carlos' skill in stripping down the sound and laying down some guitar played from the heart, rather than the textbook.
In a word - bravo!