Great apartment in a good residential area. Mar was very helpful and easy to communicate with, even with some of the issues we faced, like canceled flight and accidentally locking oneself in the room. I left behind my sunglasses and she found it and made arrangements easy to collect it when I was back in Buenos Aires for a day.
The apartment is walkable to a few good museums like the Bellas Artes and Evita museo and has supermarkets nearby. It's around a 1-ish km walk to nearest subway. A slightly awkward distance to the restuarant area of Palermo but nothing you can't get around with a cab or Uber.
All in all a great stay.