Great place, highly recommended. The apartment is very cozy, there is a large variety of books you can read, and it has some great natural light. Even though it is in Palermo, it's on a quiet street where the nightlife does not affect you if you want a good night's sleep or a stay at home day. There are a lot of stores, bars, cafes and Serrano Plaza nearby where you can get your choice of nightlife. There is an amazing cafe on Thames, not even 100 yards away.
It is very well located, and 5 blocks away you can get to Subway Line D, or pretty much get on any bus line you want to get anywhere in Plaza Italia. There are a lot of supermarkets, kiosks and small stores where you can get whatever quick need you want. Also, some amazing restaurants. You have pretty much any need met within walking distance.
You'll find a lot of tourists walking around, but also locals. It has a nice mix between residential area and a good nightlife. You have to visit the Botanical gardens, the Zoo and the Rose gardens in spring. Just beautiful! Also recommended is the Japanese Gardens. All are within walking distance if you have good legs, or you can catch a bus to get to all these places as they are all in Palermo.
Miguel will check you in and be available to whatever need. Really cool guy.
Overall, fantastic place for a family vacation, a getaway or just general tourism of the city of Buenos Aires.