We had an absolutely fabulous time at Casa Humberto. The food and activities within walking distance in San Telmo kept us more than happy the entire week. Plenty of room with two private bedrooms and a loft. The living room has a wonderful conversational layout, decorated with historical images and a bit of local artisanal flair. A short walk down to Puerto Madero, the Ecological Park and a movie theater. Just a short cab ride to Palermo and Recoletta.
We watched Tango and perused the Sunday faire in Plazza Durrego down the street. Wonderful cafes on every block with the full range of asada from street-side chorizo to Al Brigada, and fantastic pubs like Bierlife across the street and Breoghan just a few blocks away. We would go out and back multiple times a day because of the central location, and recovery with a bit of A/C.
We loved using Cabify to get around to the other parts of the city, including Palermo and Ricoletta. A cab ride is both a tour and the best place to practice your conversational Spanish. There's a wonderful guide from Juan & Stephanie with lots more local favorites.
A wonderful spot to get to know Buenos Aires, or fall in love again.