I stayed at Gabriela's apartment with a friend visiting from out of town for a week. Let me just say that we wish could live there permanently. Not only is the building new (it now has a smart key entrance and a roof top pool), but the apartment is incredibly well decorated and gets a great amount of sunlight. It's also near lots of buses and two subway lines (which are about 10 minute walk in either direction).
Gabriela has stocked the apartment so well that you couldn't possibly need anything. The kitchen had everything: cookware, dishes, full range stove, microwave, coffee maker, seasonings. In the bathroom, she provided towels, shampoo, soap and even made sure there was plenty of extra toilet paper and cleaning supplies. And finally, there's a smart TV (with Netflix!!), a safe to store valuables, and even a sewing kit. Again, you shouldn't need anything and in the event that you do, there are supermarkets, a farmacy, and other stores on the same street as the apartment.
Finally, a word about Gabriela as a host. She checked me in (my friend hadn't yet arrived) and was so wonderful to talk to. She was very friendly and gave me different tips on how to get around the city and different things to do in the neighborhood. She was also very attentive and responsive via WhatsApp, which was very much appreciated. In a word, she is awesome!
I've stayed at very nice hotels in Buenos Aires, and staying here was so much better.