Danny was an amazing host. He took time to orient me to the city, pointing out must-see sights as well as places to avoid; he also offered useful advice on money changing, restaurants, and travel to & from the airport. We had issues with the water heater, and he was very responsive. On my last day, he also spent a half hour on the phone trying to straighten out a problem I had with my plane reservation. Altogether, I couldn't have asked for more. He was a consummate host.
The studio itself is charming and the quality of the light is beautiful. I stayed for five nights, and it was very quiet every night but one weekend night when a band was playing somewhere nearby. The building is old, but well cared for, and the entrance is locked so it feels quite safe as well. The studio is centrally located on the edge of Recoleta, making it easy to explore Recoleta, Retiro, San Nicolas, Puerto Madero, and other surrounding areas. We walked almost everywhere, but both bus lines and the subway are nearby. Grocery stores, restaurants, and shopping (along Santa Fe) are also within easy walking distance.
However, the studio itself is small and offers little privacy. For this reason, it is really best suited for one person or a couple, rather than more independent travelers. The kitchen is also not very functional. You can boil water for tea or coffee; there is a small under-the-counter fridge, a two burner cooktop, and a toaster. No microwave or oven. The layout is awkward, making actually trying to cook something a hassle. So I would not recommend planning to eat in much while you are there.
Overall, a great place for one person or a couple to use as a base to explore the city.