Isabel is exactly as everyone else has written before! Very welcoming and hospitable, meeting me at the airport before she went to work. The room was very clean, simple and comfortable and Isabel had left out bread, fruit, tea and coffee. The apartment is less than 10 minutes walk to the airport (where there is also a metro station) and the estate is well lit if you are returning late at night.
I would recommend the room at Isabel's unreservedly.