I would strongly recommend this place to anyone staying in Buenos Aires, and it really is as stunning as the pictures make it out to be. As others have said, the pictures don't capture the added sense of luxury that the high ceilings add. The view when first walking in the door is of the main parlor, with a direct view of the dining room and office to either side, all furnished with period pieces and art on the walls. We did literally say "Oh my God" multiple times in the first five minutes of walking through the apartment.
The iron gated elevator gave me a childish thrill and fits in perfectly with the entire feel of the apartment and the building.
The location is also excellent. You are a ten minute walk from the gorgeous cemetery where Evita Perón is buried, and the adjacent Centro Cultural. During that ten minute walk you will pass half a dozen excellent restaurants and just as many confiterias and cafes. Also within walking distance are the Ataneo Grand Splendid, the Floralis Genérica, the Feria Artesenal, and just a little more walking will get you to the Jardín Japonés and the Bosques de Palermo.
We were delighted with our stay. Our host James answered our questions very quickly. The super for the building, Santos, was waiting for us at the door when we pulled up and gave us the keys and gave us a quick tour. He is very friendly and would ask if we needed anything whenever we would run into him in the lobby.