This place is the best airbnb I have seen in Buenos Aires - I have been in 4 places and I have seen another 3 places of a friend.
This is what I liked about the place:
+ new building and apartment
+ very good interior design
+ location is perfect for restaurants and bars, very safe part of Buenos Aires
+ excellent attention by Carlos and his assistant
+ very fair handling of my requests - firstly, I initially booked for three days and extended then, but Carlos offered the discount for one week anyway, secondly, Carlos kindly offered a late check out due to a late flight I had
I felt very comfortable at Carlos' place and I can highly recommend it.