If you are looking for a simple room for a couple of days, I would recommend to stay with Eugenia. The location of the apartment is perfect, very close to a metro station, next to the Cementery of Recoleta, and in walking distance to a lot of bars and a shopping mall. I didn't see Eugenia much, but her roommate was really nice and helpful. Arrival and departue were smoothless and flexible, communication worked fine. Thanks