Conclusion:
I can highly recommend this apartment to everyone who wants to stay in the Palermo district of Buenos Aires. You have everything around you need in walking distance: Bars, Restaurants, Mini Market and Clubs. Furthermore you can quickly take an Uber (my recommendation) to go to visit the parks or any other places within 10min. The apartment itself was super clean and moderne. Also an extra plus to the bed with its comfort. Wifi worked well without any troubles.
There is two things which I wanted to mention as well: I couldnt access my Netflix account with the TV but I havent also asked Maria how it would work. The other thing is that the building has a small cafe inside and our apartment was on level 1. So it could be that sometimes the laughs of the guests came through the door. This only applies during the opening hours of the cafe of course. I havent had any problems to sleep (siesta) at all even when the cafe was open.
Arriving day:
When we arrived at 22:10, Maria was waiting for us in front of the building to handover the keys and gave us a short introduction to the apartment. She also responded fast via Whatsapp to my questions.
Leaving day:
We had our flight at 20:05, but needed to leave the aparment at 10:00. Maria told us that we can leave the luggage at their office which is just around the corner. So you can enjoy a "day" more in Buenos Aires without carrying your stuff around. Thank you to the entire team of Be Local as well.
I will come back once I am in Buenos Aires again.