Just returned from several days in Buenos Aires (and Iguassu Falls). I had been really spooked by all the safety horror stories on this forum but found it to be a lovely city. My 23 year old daughter and I walked pretty much every inch of San Telmo, the Microcenter, Recoleta and Retiro with not a single problem nor even the faintest hint of feeling unsafe. Gorgeous city, very French/Italian, lovely people. I do have to note that, being two single women, we timed our wanderings to between 11:00 a.m. and late afternoon when all areas were filled with both locals and tourists. Before 11:00 a.m. most places, especially in the Microcenter are pretty deserted. And we never went down Florida Street because we had no desire for "touristy" shopping. We did wander in the evenings around the Recoleta area where our hotel was and it was lovely. Do brush up on your high school Spanish though. Even service workers in tourist areas speak limited English, but with a smile and some gestures it all works out. It's not as though you're discussing high finance--asking for the toilet, a Coke light, and how much something costs doesn't take much language skills! Ask at your hotel where to change dollars or just offer to pay in dollars--everyone is to offer you a better rate than you'll get from an ATM.