As a native porteña (born and raised in Buenos Aires) I highly recommend Borja's place. I currently live in NYC and traveled with my family to visit for a month. The apartment is beautiful and comfortable, above and beyond what I have experienced through Airbnb rentals so far. Also the location is a plus. Walking distance to great cafes, restaurants and a BEAUTIFUL park across the street.
Everything was exactly as described and impeccable, as good as new. Will surely return next time I visit my family in Argentina. Borja and Fer were readily available to answer any requests I had. If you want a stress free vacation, don't hesitate to book this apartment for your stay in BsAs!