We had a great stay at Joanas flat. Fantastic area and a lovely apartment. Better than the pictures too, I would say. We quickly found our favorite breakfast place just down the street, where we ate pastis de nata and drank americanos every day :)
The only thing to be aware of, is that the stairs up to the apartment are very steep (4th floor), and there is only one key on share.
We arrived at the beginning of "the Sardin festival" which starts 1st of june and ends 12th of june. This was a total surprise for us. People celebrating in the streets all over Alfama, and old ladies selling Ginja out of their windows:) It was great! But I guess, if you want quiet and calm, you should maybe book other dates than 1.-12.june, because it will be music in the streets every evening to about midnight in workdays and 02 in the weekends. To us this was no problem of course, and I really recommend going at those dates :)