Positives: location is perfect, and Pablo was super responsive. The apartment is big - looks just like the pictures.
Negatives: these are all out of the owner's control, but we thought fellow travelers should know:
1) the building has terrible soundproofing. You can hear every roll of the neighbor's dog's ball on the floor, and we were woken up every morning of our stay when they opened their very squeaky door (hopefully this will get fixed).
2) the apartment is on the 2nd floor of a 10-story building, and its only window opens into an air shaft. We had six weeks in BA, so maybe in a normal length of stay this wouldn't have bothered us, but the absence of natural light started to get to us.
Pablo was great, though, and did everything in his power to make our stay wonderful. The neighborhood is full of amazing bars and a dazzling array of restaurants, especially if you like burgers (normally I barely eat red meat, but we had burgers once a week in this crazy town!) Be sure to explore the local roof decks, and catch a polo game if you can!