I listened to El Chaval de Negro. I liked it, it had a nice catchiness to it, but I was just waiting for the giant chorus that never really came. I think something like that would have made the song really really good.
I find it hard to really get into music with other languages, but I guess it's because I have it easy and all my favorites sing in English. I do feel for those whose favorite music is not their native tongue, I feel it really hinders the listening experience.
All in all I like what I heard though.