Brian is very friendly and was very helpful to me while I stayed there, with changing money and showing places in the area. He came to the apartment to meet with me earlier than scheduled on a Sunday morning, after my flight arrived in Buenos Aires before sunrise.
Like others have said, the apartment was quite comfortable, and the wifi and air conditioning worked well.
The location is excellent, with easy access to other parts of the city, and nearby bars and restaurants that are open late. There are also some nice little cafes on an adjacent block.