I stayed at Ana's flat and liked it so much that I returned, and I would return again when I return to Buenos Aires. My review is unchanged so I will just copy and paste it:

Ana's flat is clean, comfortable and charming. It's got everything we needed for our stay and easily accommodated three of us. I chose it because it's in a great area (I know Buenos Aires well and it's exactly where I wanted to be). Recoleta is a lovely safe residential area with lots of great restaurants. It's close to the Subte and bus routes and easy to get to other parts of the city like Microcentro, San Telmo and Palermo. The check-in and -out was simple to arrange and at our convenience.