This was a fantastic apartment for a stay in Buenos Aires. Beautifully and stylishly furnished, well equipped, clean, warm (we stayed in winter) and comfortable. A great location too - above an excellent bakery (great breads and pastries) and walking distance to a range of great restaurants.
Sergio was very helpful - although he was out of town, he arranged for a friend, Mariano, to greet us, and also arranged a taxi to meet us at the airport (a very useful service I would recommend using)