Rodrigo's property was exactly as advertised: It was clean, well-appointed, comfortable, and quiet. I stayed a week and felt entirely at home. The bed was very comfortable, the shower and bathroom worked well, the appliances (to the limited extent I used them) seemed very functional, and the apartment generally felt new and well-maintained. The apartment has a working washer and dryer, which will save me about 5 kg. of luggage if I stay again.
I also had no difficulty conducting multiple Zoom calls through the apartment's WiFi, which was important to me.
The property is located in an upscale apartment apartment complex on a quiet residential street in Palermo Hollywood, about a block from the dividing line between the Hollywood (slightly quieter, more residential) and Soho (busier, more nightlife-y) neighborhoods of Palermo, which is perhaps the most upscale section of Buenos Aires. The building has a doorman and, perhaps, a couple dozen units.
Several good restaurants, including an excellent sushi restaurant (Osaka), are within two blocks of the apartment. Plaza Serrano, perhaps the heart of Palermo's bar scene, is a pretty easy 12-15-minute walk.
Rodrigo was a reliable communicator and was flexible with my delayed arrival.
Having stayed several places in Buenos Aires, I would gladly stay here again.