Great apartment. Location is very practical, close to the subway, restaurants/cafés, stores, etc. The bed has an extremely comfortable queen-size mattress (thank you Cecilia) and the place is quiet, with the window blinds blocking well the light in in the morning (great for sleeping in if you do late-night tango or clubbing).
Check-in and check-out were quick and smooth.
It was a great experience and I would absolutely come back next time I'm in BA.