I came two weeks for work to Lisbon and this space was perfect for my needs. Close to a supermarket, an incredible park, the city center, near public transport and in a very walkable and peaceful area.
The apartment was a bit cold at first, but they have an AC and a heater and those are more than enough to warm the place up.
You can hear quite clearly anything happening on the stairs/corridor and sometimes the neighbors upstairs. But the sounds are quite temporal and go by quickly.
Cèu was helpful and always answered my questions.
Strongly recommend the place.