We really enjoyed our stay at Maria's place and do recommend it to anyone visiting Buenos Aires. It's located in one of the most central areas and it's a quick uber/cabify/taxi trip to most touristy things to visit. You can walk to if you want as it's about 20-30 mins walk along a main avenue.
Her place was really clean & tidy, simple but minimalist decor and the balcony is awesome. Beautiful view to the 'dog park' (lots of dogs there!) and fabulous sunshine into the room and lounge. I'd say it is as shown in the pictures if not better. There is also gym & a pool, however we didn't get a chance to go it. Maria was lovely, super flexible about our check-in and check-out, incredibly good at responding to us and being in touch. Maria te esperamos en Nueva Zelanda! :)