With my husband we spent 3 lovely days in La fenêtre du Soleil in November.
Susana was very welcoming and gaves us some good advices.
The flat is situated in Alfama's charming area. Just be physically fit as it's going up and down ;-)! We especially appreciated that it was really quiet during the night. Really nice and bright apartment, fully equiped, to 2 min walk from tram 28.

Only 2 little points (but I think Susana we'll fix shortly): the hot water wasn't hot enough for us and there weren't any window shutters or curtains in the bedroom.

We definitely recomand this place to stay in Lisboa!!!