Super responsive to my inquiries and questions - it made the booking process and navigating to the apartment really easy.
Graciela is the apartment manager, and she's FANTASTIC. She greeted us with keys, a note of all the important stuff like wi-fi, contact numbers, etc. - a bottle of water (awesome in the heat!) and some wine. She changed money for us at a great rate, called taxis when we needed them, was helpful when we had questions about using the stove, needed to find a grocery store, etc. The apartment was spacious with tons of light from the skylights - I wanted to move in permanently. Traveling with my mother and brother (including 2 weeks in a tiny ship cabin) made me extra thankful for the room to spread out (we each had our own bedroom!) The wi-fi worked great and the kitchen was pretty well stocked for cooking equipment although we didn't use it a lot. For the most part it was pretty quiet in the bedrooms, and we slept really well. We loved it so much that we rebooked the apartment for a few days after our cruise. I'd highly recommend it!

San Telmo is a great neighborhood - we walked or took very cheap taxis to everywhere. The Sunday fair is right at the end of the street- not to be missed! Plenty of restaurants, a supermarket, vegetable/fruit stand and meat market close by.