My girlfriend and I stayed in Lisbon for three days and Mariana's a apartment is just perfect for a short vacation. It's in a great neighbourhood and within walking distance of a lot of great restaurants and cafès.
The apartment seems fresh new or very recently renewed, as the entire building it's in: very well furnished, with all the amenities you need, spacious and very bright. Very well connected with public transportation of all sorts (streetcars, buses, trains, etc.).
Mariana was very kind and welcoming and provided us with all the information we needed: if you come to Lisbon you must try this place!