This is a real cozy apartment! Very very central and you have everything you need in the flat. A place to heat your water for a mate, coffee or tea, a place to eat, a place to chill, a place to sleep very comfortably. And (for me very important: a place to smoke on the balcony :))
The flat is offside the street, so it is also very very quite.
I can recommend it absolutely!
You have all the important "colectivos" (busses) and you are between two subway stations. Plenty of restaurants, coffee bars and supermarkets in the neighborhood.
The communication with Martin was excellent.