The location is great, only 15 minutes on foot from the main square. Nice view over the Tajo and the Alfama district is lovely.
Tha apartment is nice, perfect if you need only a spot to leave your luggage and sleep in the night. Not comfortable if you want to spend much time at home, as the bathroom is really narrow and the bedroom is made out of the attic, which makes the room small and very hot. The good aspect: no noise, I slept without any problem.
FYI: the apartment is on the 4th floor and there is no lift.