Martin is a very nice guy and a great host, very punctual, very easy to communicate and flexible on check-in timing, which is a huge help if you are arriving late to the city. He provides you with a guide (on Airbnb, becomes visible upon reservation) with special tips for his hosts which is a great way to start exploring especially restaurants and bars. By the way, I would add Café Registrado, La Hormiga and Krishna from the neighborhood in there. :-)) I feel very lucky to have met Martin.
The apartment is good for 1-2 people. There is enough space in the living room area to put all your suitcases. There is a big closet in the living room. It has one of the best possible locations in Buenos Aires and one of the best locations in Palermo. It is on a very popular street but just perfectly far enough from the cafes and bars. It is very close to a big avenue but there is absolutely no street sound as the apartment is at the back side of the building. I stayed a total of 10 days, 5 days before our trip to south and 5 days after. It was the best choice, best option for me.