Marcos is an absolutely top-class host. He is quick to respond, patient, thoughtful, helpful, and friendly. He was more than accommodating to me as a visitor, and went out of his way to make me feel welcome and to help me navigate bus/underground routes and the money-changing system, etc. He was a host but acted like a friend. As for the space, it's idyllic and relaxing. And there's a piano if you're lucky enough to hear him grace it! I recommend Marcos as a host, and also just as a person. Great few days in Buenos Aires.