This is a beautiful apartment in an ideal location, just a short walk to the Cathedral and a tram stop for the number 28, just down the road from the supermarket and close to the Praca do Comercia with all the lovely bars. Helena left a map with all the useful places marked - many thanks!
The apartment is above a bar/restaurant and one evening when I stayed in I could hear the music until quite late however it was rather lovely music so not unpleasant and when it stopped the area returned to the normal quiet.
The apartment is set between two buildings currently undergoing renovations but this did not prove to be intrusive as if you are in Lisbon you will want to be out enjoying the city during the day and the builders do not start early or work late in the afternoon.
I would highly recommend this lovely apartment and when I return to Lisbon I hope to be able to book this apartment again.