This is a nice place with a cool terrace (commonly used) that gives an astonishing view over good part of the city.
Only downside for me was the noise from the always busy street in front of the building and some minor issues with cleanliness (cigarette smell). But if this is not as important for you as it is for me, this should not be an issue at all.
In my view, the apartment is an especially good place for 1-2 persons, who want to enjoy Lissabon's night life.