This is a studio apartment on the 7th floor of an old but still well-maintained apartment block. Although the few blocks immediately adjacent are somewhat socio-economically depressed, the location is extremely convenient, being only a few metres from a subway station, and only a few blocks from Teatro Colon and the Obelisco. We were able to walk to the port (to take the ferry to Uruguay) in 15 minutes. Some chic shopping centres and streets (e.g. Florida) are less than 10 minutes walk away.
Jimena, our host, was excellent. Although she lives in Rome, she was in constant contact with us by email before, during and after our 2-week stay. She constantly asked us if there was anything else that she could do for us.
The apartment itself is a fairly large single room (as in the Airbnb photo), with an adjoining full bathroom, including shower, toilet and bidet. There is a small but very well equipped kitchen adjacent and a petite dining area in the large entrance/hallway. All facilities were exactly as described in Airbnb, with cable TV and Internet easily accessible through in-house Wifi.
The street below, very busy in the daytime, was a bit noisy at night, mostly because of resurfacing and other works, but we soon got used to it. We felt fairly safe in the neighbourhood, and the building itself has a 24x7 concierge service, with one of a team of doormen present to greet us every time we went in or out.
Altogether, I would highly recommend this place to an adult couple or single person. Our stay was extremely pleasant, thanks tou our very attentive host.