Sergio was not there when I arrived, but he left someone in charge that was welcoming and made sure everything was OK. After arriving, he and his wife made sure that my stay was as pleasant as possible, which was really nice. The space itself is nice with lots of closet space and a desk to place your belongings. The neighborhood is not for everyone; though not unsafe, it is definitely rough. That said, the location is conveniently two blocks from a subway, so it is easy to come and go.
Overall I would recommend the stay at Sergio's especially for shorter one to three months stay and if you don't mind the location.