Maria and Enrique are the perfect hosts! I really feel home, they helped me in any possible way (from local tips to improving my Spanish skills). Their maid, Norma, is nice and discrete too. The house itself is old but charming, particularly the terrace - I recommend you have a glass of Malbec there at sunset. As the area is very central, it might be a bit noisy - especially in the night. Not a big problem then, Buenos Aires has a lot to offer and there is a good chance that you will fall asleep before noticing any noise! I will definitely come back. Grazie mille, a presto :)