I have stayed in many AirBnBs and this is one of the best that I've ever stayed in. We stayed a full week here and it was not only a comfortable and convenient place, but also really enhanced our enjoyment of Buenos Aires.
The place itself was clean, comfortable, and had every amenity needed, including elevator access and a security guard. Eric was a great host and provided lots of good info. The locals in the building were kind and engaging. Absolutely everything you need is within a 5 minute walk.
But the best part of the place was the balcony which overlooked the local neighborhood plaza with it's church and park with playground. There was always some interesting activity going on here which one could sit and watch from the balcony - everything from normal daily life to a weekend market and live music.
Highly recommended.