This place was amazing and even nicer than the pictures show.
The "Dome": It was very clean, unique and comfy! The bedroom is the top of the dome, a nice round room with a double bed and nice wall paintings (the sky). The bathroom was fully equiped with various towels, Shampoo, Body wash, conditioner and so on. A plus: Walk-in closet :-)
Location: It is located in the heart of Buenos Aires downtown within walking distance to everything (less than 5 min to the main shopping street, close to some sights and approx 15 min walk to the waterfront).
Host: Nico is very friendly, helpful and a perfect host. Communication before and while our stay was very easy, he speaks perfect English. He prepared cold drinks, dulce de leche, cookies and crackers for us and brought us Alfajores as a goodbye-gift. He also organised a taxi to the airport for us. He made sure that we enjoyed our stay! I can definetely recommend staying with Nico!