Some comments for this apartment call San Telmo gritty ; this is correct but it is not unsafe and quite close to downtown
The overall evaluations of past comments are correct: good wifi, well equipped kitchen and reactive owner -we had a problem (in part our fault) with one toilet fixed in two hours) We would had that next to the exit on Chacabuco there is a small store selling very nice pasta The apartment complex was designed by a German architect Carlos Nordmann and built in 1915 http://arquitecto-nordmann.blogspot.com/
The pictures are mostly correct but one should be aware that:
1) in the bathroom on the main floor there are two unequal steps up to the bathtub/toilet without a ramp ;this could be an issue if you have mobility/vision problems
2) the top floor bedroom+ ensuite both have low doorways that could be problematic for anyone over 1,75m or 5'10'' Also it overlook the downstairs room that is there are windows that open inside the other room at the top of it - an unusual arrangement
That said it was very good value for money and we would certainly consider renting this partment anew if we returned to BA. it was