It was a really great stay, we never actually met Sofia but her mother welcomed us and helped us with any problem! Though, she didn't speak english, we found a way to communucate anyways!
The flat was very clean and cozy, the location is excellent - very close to the city center, everywhere around you can find cool cafes, restaurants, supermarkets and other shopping possibilities. Sofia also had great tips on what to do and see in lisbon!
It was an amazing stay-we would recommend!