It's difficult to juggle intensity and good pacing - if you get one wrong, it messes up the other. Many bands forgo one in order to focus on the other, but a skilful few manage to keep both in full effect. Bands like Kepler, Espers, The For Carnation and Migala keep the intensity high despite their generally slow pacing, and the effect is almost universally good. Now, I'm not talking about just an overextended climax (I'm looking at you, Yanqui U.X.O.), just keeping your ears pricked because every sound is made important by careful writing, playing, and mixing.
Now, I'm not proud of it, but I confess that I was unsure about getting this album because of all the Spanish. Not that I have anything against Spaniards or Mexicans, it's just that I find singing in other languages, Spanish included, to be distracting sometimes. If you share my prejudice, be calmed because there is little or no Spanish actually on the album.
The music itself is, if you can picture it, high intensity but low key - a sort of passive-aggressive album. Even when the singer is whispering slowly in his excellent, low voice, you feel like there is a crash of guitars hanging just above your head, ready to drop at any moment. It rarely happens, but the threat feels real nonetheless. The sound is clean and, to my limited knowledge of the man, reminiscient of Ennio Morricone. Songs generaly switch between beautiful but incindiary guitar parts and quiet vocals, sounding like he's dying of a gut shot and telling you of his many regrets. The best example would be "Ciudad del Oeste" and "Aquel Incendio," the central two-part song that spans the entire distance from nearly silent warbling to wailing, distorted crescendo with superb grace. Other songs are notable: the instrumental opening track with its similar building-up of guitars, and "Tiempos de Desastre," a nice do-all song. Some don't fare so well - mainly when the vocalist sings too hard, it throws the whole feel off; his voice sounds much better soft.
You'll know right away if this is your scene or not - the organ and guitar establish a sound that is very distinctive and beautiful, if you're into that whole lonely western feel that Morricone and Tulsa Drone love so much to cultivate. In any case, this double song is great no matter what, so enjoy.