So ladies and gentlemen, this is Lisboa at her best.
The flat is cozy, spotlessly clean and perfectly located, near to everything you could possibly need but on a surprisingly silent street (please do keep it that way). There is a convenience store at just few meters from the flat, "a fábrica de nata" at 3 minutes walking and on calçada Santana itself "a tigelinha": a little gem for delicious comfort food at honest prices (two main courses, 50 ml of good white wine, two deserts, bread and olives for about 20 euros), no tourist oriented whatsoever, generous portions.
The host: Bárbara is an excellent host who really cares about the well-being of her guests and is always present through the whole process. Really present. Checking in and out was as easy as it gets. Thanks, thanks, thanks.

Post scriptum:
This place worths every single euro spent and people... no photo can make justice to that splendid terrace. I was expecting a good view, I've got THE view.