Great listing, great apartment. Martin happened to be out of town while I was in Buenos Aires, but he helped me out remotely and arranged for me to check in, check out (twice) with no hassle. I ended up having my trip extended for 2 days as a result of a blizzard in New York, and Martin helped me out by extending my stay for those two days.

As for the apartment, it's in the perfect place for eating really good food, walking around to parks, etc. It's a few minutes from the city center by subte or taxi, so it's a great deal.

All in all I would definitely stay here again.