I was mostly in contact with Maria, but both Maria and Enrique are exceptionally nice and warm-hearted hosts who do everything they can to provide you with all the information you need and give you useful suggestions and hints what to do and where to go.
They even provided a little welcoming dinner on my second evening where we (the guests) and they sat together and had a nice chat. And the following week Maria and Enrique provided a big barbecue on their wonderful roof-top terrace to which all the guests were invited, it was a wonderful evening which I will remember for a long time. :)
As my Spanish was unfortunately not very good, I could talk with Maria in English without any problems. I really enjoyed the talks we had. :)
The apartment is located in Recoleta, a few blocks from Palermo. The parks nearby the Museo Nacional de Bellas Artes are just a few blocks away, so you just need like 5 mins of running until you are in a park where many other people do their workout, there is even outdoor sports equipment in the park, really cool.
To the most beautiful parts of Palermo with cobblestone pavement and all those nice bars, cafes and restaurants it is only 15 to 20 mins by bus (use the Moovit app!) or 10 mins by Uber.
All in all, I can highly recommend that place and would definitely return once I visit Buenos Aires again.