We are a couple and travelled with our 2yo daughter.
The apartment is a very spacious studio, with wonderful hardwood flooring. There are some drapes that can discreetly separate the bed area to the living room. It is modern, cosy and spotless clean overall, with plenty of cleaning products and facilities for guests to keep it that way. Shower/bath is pleasantly hot and works fine. Kitchen is well equipped and resourceful. The only thing is there is an exhaustor, but it could be a bit more powerful (in our case, we cooked every day, so the smell of food kind of took over the apartment).
Internet speed is very fast and you can use the phone for local calls, which is very useful.
The balcony is lovely, we could have all our meals there, even when it was raining outside. There's a view to the garden/pool area and the glass doors perfectly keep all the noise away.
Pool/bbq area is green and very relaxing and can be used by guests. The only thing is that there's a cost to use the bbq (parrilla) - 300 pesos - and you have to book it in advance.
The building is new and very safe, walking distance to bus stops, baker's, supermarket, food market and fine, non-touristy restaurants. Easy to wave down a taxi at busier Av. Paraguay.
Graciela was a great and kind host, always answering our questions and giving suggestions. She can be reached via Whatsapp, which makes things easier. I'd definitely recommend her apartment to anyone wishing to have a truly Argentinian experience! =)