I stayed for a month at this absolutely fantastic place, it already looks great in the pictures but it's even better in real life. Some key takeaways that would be helpful to future guests, in no particular order.
* The host made himself available via whatsapp right away and was very responsive when I had any questions regarding my stay.
* I was greeted by the host's helpers from the taxi, was handed two pairs of keys and was given a quick welcome tour of the apartment. Apart from that I was left in privacy and I personally enjoyed that.
* The kitchen has all the needed appliances, including a nespresso machine, a small french press that you can use for coffee or maté, a blender and a citrus juicer. Given that in summer the oranges are ripe and plentiful I really enjoyed starting the day with a coffee and a glass of fresh orange juice.
* The apartment occupies the whole 8th floor of a modern building with a large balcony and a fantastic view. I got to see some polo games happening on the field that the balcony oversees.
* Even though the heat sometimes went up to +35C, indoors I was able to keep it cool thanks to two ACs, one in living room one in the bedroom. Furthermore, since the balcony is unobstructed by other buildings, you get a very pleasant breeze during the day.
* The balcony has an electric-powered awning (toldo), so even in the heat you can lower it and sit outdoors in the shade and enjoy the summer breeze.
* Even though there is no laundry in the apartment or in the building, right across the street (less than 1 minute walk) there is a lavanderia that charges 170ARS ($2.5 USD) per bag of clothes for next day service, they iron and fold. I was worried about not having a washer/dryer in the apartment during a long stay at first but frankly had no issues whatsoever.
* The wifi was very good, I was able to both stream movies and work with no issues.
* All the shops are close by, COTO is 4 blocks away, Dia is 1 block away, and plenty of small grocery stores scattered around the neighborhood.
* Uber works very well in Buenos Aires, better and cheaper than taxis. 10 minute ride (or 20 min walk) to Palermo Hollywood, 20 minute ride to San Telmo.
10/10 would stay again.