I stayed at Emiliano's place for 3 months. The apartment is charming, quiet, uniquely decorated and well-equipped for a stay in Buenos Aires. The kitchen has every utensil you could dream of (although a larger frying pan/wok would be nice) along with a small hob and electric oven unit. The air-conditioning functioned well, the bookcase is well-stocked, there is fast and reliable broadband internet with a small fold-out window desk area (my one complaint would be that the chairs are not very comfortable for serious use as a freelancer; since I stayed so long I bought my own office chair, but that said, they'd be perfectly fine for more casual/short-term use). The shower was hot with good pressure. The bed was fairly comfortable. You even have Netflix.
The apartment is certainly small for the price (around the size of a large bedroom and with a single bed), but as a solo traveller it was perfectly adequate for my needs.
Recoleta is one of the most upscale neighbourhoods in the city, and nearby to the apartment is everything you could need such as a laundry, bars, subte (metro), green grocer's, supermaket (Carre Four) and so on.
I never met Emiliano in person, but he seemed like a great host. He was always available via Whatsapp, very friendly, replied promptly and I felt went out of his way to ensure I was comfortable and everything was going well.