We had a good stay at Matt's apartment. It is a lovely apartment, clean and new. Especially the bathroom with shower looks fab! The neighborhood is great, Palermo is the best place to stay in Buenos Aires! Lovely ambiance.
When renting this Airbnb you should realize that this apartment is in a building with all Airbnb apartments (so you're not in someones home) and thus kitchen tools are limited (1 pan, only two sets of knifes and forks, no salt/pepper/oil etc). Of course this shouldn't be a problem when you're using the Airbnb apartment more as a hotelroom instead of a full apartment. But for us that wasn't a problem, since the neighborhood is full of good restaurants!