I spent almost 3 months in Nico's flat. The apartment is perfectly situated between Recoleta and Palermo. It's light and spacious and has everything you would need or wish for. Especially the Balcony from the living room is really nice, has a great view over the city and thus perfectly lends itself to having a glass of wine and a nice chat with the hosts.
During the first month Nico and Fede themselves were still traveling, so Nico's best friend Melissa stayed in the apartment and took care of everything. Melissa is great, an absolutely lovely and charming person. She made my first month in Buenos Aires really easy and fun giving me loads of tips, showing me around and all together made me feel very welcome.
One month into my stay Nico and Fede came back and kept up the amazing vibe that Melissa had set. It felt more like living with my flatmates back home than renting an Airbnb. I would go back there any time and can highly recommend this apartment, if you are looking for a place to stay in BA.