Paulo's apartment is faithful to the description he made of it. He was very helpful and gave us advise and had some documentation in the apartment. The place is really central, approximately 15min walking to the subway with blue and green lines and same amount of time for station Cais do Sodré where you can take train to Belém, beaches, Estoril and Cascais. Location is close to restaurants and Santa Catarina viewpoint.
The only remarks we would have is that it can get noisy at night (mostly at the end of the week) due to the location so if you have children or you are in Lisbon for a rest, keep this in mind.
Our favourite things were the location, the functionality and the cool temperature of the apartment. Since it is in a small street, the sun does not hit directly the windows and the apartment does not get hot during the day.
We had a great stay at Paulo's place! Thanks again!