I so much enjoyed my stay on Osvaldo's place, it's well located, fully equipped, clean and comfortable. The metro is 5-min walk, there are several clubs near it and some spots to visit as well (for example; San Cristobal hill and one of Neruda's houses) at 3 or 4 blocks away. The neighborhood can be crowded on weekend nights because of the clubs.
Osvaldo was very welcoming and helpful, we could count with him almost at any time. I left my USB drive on his place after checking out and he just waited for me to pick it up.