oh hi!!
my best friend currently lives in buenos aires! though i cant claim to know hundreds about it, and ive never been to visit (my excuse being 3 kids under 4 and no dosh).
anyway, we are both scottish and her italian husband got a job out there 4 years ago.
it is a giant, fuck off, big city (have i emphasized that enough?!) the city centre has 8 lanes of traffic ON EACH SIDE!!!
it is really, Really, REALLY NOISY.
she has not had a problem with safety, though i have read travel stuff re gangs.
the extremes of wealth and poverty are horrendous.
i'd get her to advise but they are currently over here for xmas and have went to islay for new year and so are out of radio (ie, phone) contact.
all her family have been to visit her and seem to have had fun.
go for it! its only a holiday after all. imagine the flight would be the dearest thing.