Thanks a lot to Alexandre and Carolina !
All was great !
Carolina welcomed me at the apartment and gave me all I needed regarding the accomodations and places to visit.
The apartment is very central and near the subway, tram 28, and train station to visit Sintra.
If I come back, I would choose the same place.
Alexandre and Carolina's were very kind to me, they are great hosts.
All the best for both of you. V