This apartment is located in a prime neighborhood with walking access to EVERYTHING. There is a great pizza place next door and a lovely cafe directly across the street. Within a very short walk, you will find multiple small food markets, a couple of larger markets, a terrific wine store and several great restaurants and bars. The building itself has only 5 floors, is modern in style, clean and very well-maintained. The apartment, as well, was clean, well-maintained and exactly as appeared in the photographs.
There are few things that could be improved upon, but they are minor. The only "comfortable" seating on the main floor is a sofa. An additional comfortable club chair could be added. It would also be great to have some basic staples available (e.g. sugar, olive oil, basic spices, salt and pepper, bath products, etc.).
There was some communication confusion about the check-in procedure, but it all worked out. The Super of the building let us in and was very friendly - though be advised he speaks no English - have some Espanol or your google translator handy if you are an English-speaker!
If you are coming from the USA, what is listed as a pool is really a large bathtub and may not be your scene - wasn't an issue for us since it was not pool season in BA at the time of our stay.
As I said, the above issues are really minor. We would definitely stay here again even if none of these items were addressed.