Catalina is a nice and friendly host, graciously allowed me to leave late on my last day (as my flight was scheduled for midnight), for which I am truly thankful for! She speaks English just fine, tho it will help if you speak slowly and pronounce every word clearly.
The room is very clean and tidy, with a lovely view outside the window exactly as shown in pictures. Air-conditioning is available for use if needed. The living room and kitchen are available for use unless if Catalina is working or hosting her personal friends. Every Tuesday a housemaid cleans the entire house. The only rule applicable to guests is to refrain from walking all the way down the corridor inside the apartment into her own personal space, and I can honestly say to her and publicly that I have fully respected her request for privacy, and never ventured down the hallway regardless of whether she was in the house or not.
The neighborhood is very laid back and quiet, very safe to walk around even late at night. The building itself is secure with a guard on duty 24 hours. It is about 10-15 minutes walk to the main street to catch the subway, but the trick is to learn the bus routes right around the corners, and Catalina can most certainly help with that. And while you are walking to the bus stop, drop by Freeport Helado one block away for some creamy dreamy ice cream! ;)
Will definitely recommend Catalina as a host, and her lovely sunny bedroom is certainly a highlight for my trip to Argentina!