I stayed two and half weeks in Gustavo's apartment in Recoleta and enjoyed every moment of it!
The apartment is really nice for one person and comfortable also for two people. The kitchen is small but well equipped - I had everything I needed.
The location is excellent for tourists. The area is safe and really nice.
Within a few minutes walk you can find a supermarket, many nice restaurants (cheap eats, traditional restaurants with excellent food and even some fine dining options). If you need anything late in the evening, some corner shops are probably open. And of course, after my first week a new ice cream shop was opened only 50 metres away from the apartment...
Also some very popular tourist attractions are only 15 minutes walk away from the apartment. For example, Recoleta Cemeterium is very close to the apartment. You can easily walk also to museums in Recoleta and Palermo areas.