What can I say? A lot!
1. Javier's place was exactly as described and even better in person. He has a great eye for design and attention to detail. The place was spotlessly clean and there were little bits of Argentinian flare such as not only coffee provided but mate as well. Welcomed was the cold beer in the fridge. A thoughtful touch.
2. The location was extremely walkable to various other neighborhoods and if not, the bus wasn't too hard to use, though I would recommend that if you don't speak Spanish, stick to the train. :) ;) There were tons of shops around to get groceries or things you might need from a drug store, along with places to eat.
3. The best part: Javier. An extremely welcoming host, he did everything he could to make me feel welcomed and then some. He provided a list of recommendations on things to see, places to eat, and how to get a round. More importantly, he showed a passion for explaining the nuances of Argentinian culture.