I stayed in the apartment for 2 months. It's on the Argentine Piso 1, or the second floor, at the back of the building, which was much quieter than the street side.
The apartment is spacious by BsAs standards having 1 bedroom & 1 large room that includes the living & dining area and the kitchen. Both rooms have air conditioners that worked well. There's a balcony with a washing machine & where I was able to hang my hammock. The bathroom has plenty of space with a toilet, bidet & shower/bath tub & hot water.
The kitchen was reasonably equipped, though I ate out often. I found the neighborhood to be very safe at night and there are a restaurants, vegetable/fruit sellers, groceries etc. within a 3-4 block radius. The place is 4 blocks from the Malabia Subte B station (Av. Corrientes) & close to colectivo (bus) stops on Calles Serrano, Camargo & Thames.
Fernando's mother is the contact person. She's friendly, responded quickly to questions & was flexible with the check in & check out.