Loved, loved, loved this apartment. Location: perfect. We are walkers and it was an easy walk to the museums and parks in one direction and the restaurants of Palermo in the other. There was a bike share station outside the front door so we could bike to San Telmo or Costanera Sur (or Norte) in half an hour. While this is not like the parts of Palermo with dozens of trendy restaurants, there is a great pizza/empanada place across the street, a very good (and reasonably priced) parilla a block away and a grocery next door.
The apartment itself was also perfect. Nicely decorated in a way that struck a good balance between being interesting but not too personal. Since we were there for eight days, it was really nice having a real living/dining room as opposed to many of the BA listings that are studios. And the AC was wonderful, particularly since it was over 90F every day we were there!
Finally, the host was very responsive and let us leave our bags when we arrived on the early bus.