Let me be frank from the very outset: This isn't working for me. I find it really hard to get into the third album from Mexico's Zombiefication. This is why:
The production sucks in the sense that it could have been from circa 1989. It's as if the drums are detached from the rest of the sound tapestry, and the snare has a crappy, hollow sound. The bass is a thundrous blur, a monster sound, but not in the positive respect.
The vocals are possibly intended to be growls, but they sound like shouts, and that may also have a great effect. In this case, it doesn't, though. If it had been placed on top of a well-structured and well-produced effort, it might have worked, but in this setting of a slightly chaotic and most of all noisy rumble, there's really not much else to say than better luck next time and hang on to bits and pieces like the beginning of the track of the song Opression to the Mexican hopefuls.