Not only the flat is great, clean and neat, but it is also perfect for short and long stays. I stayed for several months, and this flat was one of the most comfortable flats I've ever been so far. Not only that, but Sergio and Andrea are fantastic hosts. They went so much out of their way to make my stay great. The area is one of the best you can get in Buenos Aires. It is near everything such as pubs, bars and restaurants but at the same time, it's quiet and relaxed.
I would 100% recommend the flat and hosts to anyone. They are fantastic.