We had a pleasant stay in the apartment of Rose and Antonio. The location of their place is great as many or actually most of the sights are within a walkable distance. Furthermore you've got small shops and cafes nearby as well as small cinema (6 € / movie).
Rose was always around to help out or answer questions and gave us welcoming feeling.
The apartment was abaolutly comfortable. The only minus point was the traffic noise outside which you should be aware of.
Apart from that we can highly recommend staying in this place.