We had a very pleasant stay in Buenos Aires and our stay in Alejandra's apartment had a big part in that. Because of the fine weather we could enjoy the rooftop terrace a lot.
Unfortunately Alejandra was not in town but her neighbour Carolina was very friendly and very helpful. We had some problems with the television and the hot water supply but Carolina fixed them both.
Although SanTelmo is a very busy neighbourhood the apartment is pretty quiet.
If you like to stay in San Telmo then I would recommend Alejandra's place