I have spent two weeks in total at Maria and Enrique's house and I felt at home from the very first time. They are gorgeous, caring about you and trying to make your journey in Buenos Aires a real Argentinian experience.
The house is beautiful, clean and decorated with character. I had the room with ensuite bathroom with very comfortable bed and nice shower. The roof-top terrace is great and perfect to hang out with the hosts or with other travelers. Since the house is big, there is also a lot of place inside in case of rain.
The area is perfect to explore the city, very close to the city center but away from the touristic area. And if you want to go out for the night, you can reach all the bars and restaurants by foot. The neighborhood is safe, I was traveling alone and I felt secure.
I highly recommend this place, you won't regret it! I would definitely stay here again if I would come to Buenos Aires.