I apologize for reviewing in english, I don't trust my spanish very much...
Listened through the whole thing twice, and didn't get bored with it at all. The mood and the groove somewhat fluctuate throughout but in a very good way.
The vocals were performed flawlessly and are perfectly equalized in the mix. On that same note, quality in general is great. Nothing's muffled, and everything can be heard without any instrument dominating, with the exception of the gorgeous solos. (Such as the guitar solo in "el espejo", and the awesome bass scale in "nada personal".)
The instrumentation is great - you're all very talented and you play with a perfectly unified groove.
By the way, the cover art is very cool.
Overall, I don't know of anything I don't like about it. And I'm not even a huge fan of the genre.