hey labret, it's kinda secure,as long as you don't walk the streets
now seriosly, of course it depends where are you going to get into, your first impression will be a shitty one since the employees at the major "national" (spanish) airliner are doing some not-so-peacefull manifestations (is that a word?) overall you'll find a normal once "world capital" (heading for third world), just be careful if you're going out by night. I'm 400km away from buenos aires in mar del plata (
http://www.argenet.com.ar/emtur/main2.html ) here's really secure
It's still cold here and getting into the spring season, in november it would be a lot more hot.