Catalina is a warm and kind host, and communication was great despite me not being able to speak Spanish.
Her place is clean and comfortable, and her family is warm and friendly. Perfect for solo travellers! It is true that the walls are thin, but I did not have any issues with sleeping at night, and it is also very common among the apartments there.
The location is excellent, in a neighborhood with lots of restaurants, cafes, and bars, but still quiet enough to be peaceful. The metro is very close and its only a few stops away from all the major attractions.