My stay at Matias beautiful studio in Barrio Belgrano was perfect! The place is absolutely clean, confortable, modern, great an safe location with all you need around: Starbucks at the corner, supermarket, great restaurants for dinner, laundry's, cafes, shops and much more.
The subway (subte) is really close and takes you to all good areas: Palermo, Theatre district, Plaza de mayo (casa rosada), Recoleta, etc... minutes away.
Matias is very helpful and welcoming, he explains everything well about Buenos Aires, he also showed me around the neighborhood, texted me in the middle of the stay to make sure everything was okay.
I would definitely rent his place over and over again!