Probably the best AirBnB I've ever stayed at, honestly. Didn't really want to leave. Spacious, secured, no real problems with Wi-Fi, A/C, stocked with the necessities, nice location (everything you NEED is within a few blocks, although it's not tourist/expat central or anything), great balcony, washing machine, comfortable bed, quiet in general -- the only weak point was the shower. Low water pressure and not the hottest.
Amilcar is also an ace host, and he's quick to reply and extremely accommodating and helpful. I would've stayed here longer if I could have, and would definitely stay when back in Buenos Aires. Can't recommend it enough!