The flat is in an excellent location, very close to a metro station with two lines, close to the park, close to Avenida de Liberdade and close to many good restaurants. Overall, very easy to get from it to anywhere in the city.
This is a building with several Airbnb flats. In our flat the A/C was not cooling very well and it was a bit hot. It was quiet though.
Note that the apartment is small. It's fine if you just want to have a place to sleep, but the kitchenette is not big enough to actually cook and eat in.
Overall it was comfortable, and location is a big plus.