I have been fortunate to have traveled to lovely Buenos Aires, Argentina on about five occasions and have stayed in apartments during the majority of my stays there. One company which I have used on two or perhaps three of these occasions was "Apartments in BsAs" www.ba4uapartments.com.ar. This is a gay owned and operated company; the prices for rentals are quite, quite reasonable; the apartments themselves are modern, stylishly furnished, and located in the more tonier of barrios. I've stayed in two apartments in Recoleta and one in Palermo and have been more than satisfied with all components. Whenever I manage to return to the "land of the portenos," I'll definitely give this company additional business.
The owners and managers and assistants are highly professional and quite helpful. Once you arrive at the specific apartment, the assistant will arrive, take you to the apartment that you're renting, sit and discuss and have you sign the necessary papers, give advice and guidance and answer your queries. On the time of departure, he'll return, do a quick check of the apartment, and return your deposit. If you have made arrangements for your airport return, that will happen, too.
I like these guys, for when I had a couple of concerns, I just rang their office. What I desired was handled immediately. So, men, when you have made travel plans to BsAs and desire to stay in an apartment during your time there, I'd highly, highly recommend this wonderful company.