Andre's cozy Lisbon flat is in such a great location! We loved staying there! At night, the area on the street above is filled with cool restaurants and bars - although we did not get the chance to fully take advantage as we were sort of further afield meeting friends in various other parts of town.
It is walkable to both Rossio and Martim Monez metro, which makes it great for arriving by metro from the airport (about 8 mins walk from Martim Monez) and perfect for adventures to Sintra, the beaches and so on. When using Uber it may be a bit of a challenge until you understand sometimes it drops you above, and other times below. Once you get the knack it's great, super handy and inexpensive.
All I can say is we loved Lisbon - loved the apartment and cannot wait to return.