The apartment was as beautiful as pictured. It is indeed located in a central-ish area with the subway and tram right next door. You are about a 20min walk to the main streets of Lisboa which is quite nice.
The only thing is that the neighbourhood felt a bit unsafe and unkept, and the apartment was extremely noisy. You could hear the tramway, the street and the bars, but also a lot of sirens coming from the police station down the road. There were also a lot of bugs.