Communication between Sebastian and Guillermo (his local contact) was superb and they were great about helping arrange paid airport transfer, pointing out some of the local area and resolving issues.

The place: is in a six unit residence. It is *very* spacious and comfortable (especially the bed) and the neighbors are friendly even helping me when I struggled with the keys during my first day. Worth noting - if you're not accustomed to traditional SA keys, this system will take a day or two to get used to. The furnishings could use a bit of a refresh, but I've been told this is underway and is really only an issue if you're making an extended stay as I did.
The location: While not located in the "thick of it", it's about a .5 mile (or 15-20 minute walk) to the action in Palermo Hollywood and Palermo Soho. No significant street noise, but sufficiently busy enough to easily grab cabs. Neighborhood is very safe although some foreign visitors may find it a bit gritty. 10 minute walk to the B subte and a 20 minute walk to the D.

Overall I recommend and would stay there again.