I stayed just over a month at Sergio's and honestly I wish I could have stayed longer - Sergio's home is beautiful and in a wonderful location, and he keeps it impeccably clean. My room was spacious and comfortable the entire stay.
More importantly Sergio himself is an absolutely wonderful host, who instantly made me feel welcome and invited me into his circle of friends while I stayed with him, which was extremely appreciated as I didn't know many people here in Buenos Aires when I landed.
I really can't say enough about how much I enjoyed my time. Hope to do it again in the future.