It wasn't Frederico but Florbela who welcomed us. She was very friendly and helpful, always willing to answer all of our queries. She explained everything well and provided us with some hints and tips.
The apartment is great and has all necessary things. It was super pretty and clean and we had a lovely stay there. It is located in a nice and calm neighborhood and you can easily get anywhere from it (metro station is just 12 mins by walking).
Thank you Florbela for all the help and warm welcome!