I traveled with wife and two young kids to visit family and we were looking for place with a great location that would allow us to have a nice and quiet breakfast, w/o the need to coordinate and rush altogether to a hotel lobby. We also looked to have downtime between sightseeing and dinner (anything before 9:00pm would be too early for local standards). The apartment worked perfectly...no issues whatsoever. The kids love their separate space upstairs and we enjoyed the privacy of the large master bedroom. The apartment is perfectly located and within 3 to 4 blocks we got the massive public transportation (bus and metro) the city offers.
The owners had thought on every little detailed; from the American and Argentine phone lines, to multiple TVs, to a well stocked kitchen. The decoration of the place is nicely done and place was very clean.
I noticed that some reviews comment on the fact that there is no laundry on the apartment; don't worry, literally across the street there is a laundry mat where we dropped our stuff on the morning and it was nicely cleaned and folded by the evening.
The one thing that I'd like to see for next time (I'm definitely coming back) are blinds/curtains on the bedroom...I want to sleep in when on vacation.