The apartment is perfectly situated in a very busy part of Lisbon very close to the tram, the metro, restaurants, bakeries and loads of shopping. We drove a car and parked in a nearby garage for 13 euro per day and never need the car while we stayed there. We were able to walk to the marina and all most of the tourist-y spots and as well as the train to venture our further. The apartment it's self is so cute and very clean and well-decorated. It includes a washer/dryer, which was so helpful!
Speaking of helpful, the location of the entrance to the apartment is not obvious from the street, but Giancalo was there to greet us and help us find the door. There is a lot of commotion outside the window at night on the weekends, but I found this to be fun and exciting watching from the window. If you think this will bother you then pack a pair of earplugs because the apartment is perfect!
P.S. not recommended for anyone who cannot climb 3-4 flights of stairs.