that's a rather nice apartment in a good location, close to transport stops, metro and to a viewpoint with wonderful view over the city 🤩 (It is located on the hill that you'd have to climb every time if you're on foot)
the apartment is very small but it mostly has all the important stuff (except washing machine). due to it's size some things are not that convenient though (especially tiny bathroom next to equally tiny kitchen). because of that it will not be comfortable for big people, and it definitely doesn't fit tall people - pay attention to that detail in the description.
at the moment of my staying there were construction works in front of the building (loud and dusty at times, but it seems that Lisbon always has something under construction).
if you don't plan to spend much time at home it's a decent accommodation option.