This is a great spot. The Belgrano / Núñez neighborhoods are chill areas––they're close to the action in Palermo, but a lot quieter and less touristy. I've lived in Palermo and Recoleta, and I preferred this area to the former two. The apartment itself is great. It's clean, has what you need for cooking, and there's tons of closet space for one or two people.
The building is nice, too. It's newer than most of the buildings you'll find in Palermo or Recoleta, so the elevators are big and fast, the infrastructure is good, and check-in is super easy. 100% recommend this spot.