This is a great choice for visiting Lisboa. The location in Alfama is perfect. Everything is walkable. Lots of restaurants, shops and you can reach other neighbourhoods as well as cultural landmarks.
The apartment has lots of space and the terrace off the bedroom is magical. You can see the water and enjoy a morning coffee with the sunshine.
Highly recommend staying here.
One note, there are quite a few stairs to reach the apartment (no elevators) and the area has hills. make sure this is ok for your health :)