This is a charming little place.
Be prepared to climb some stairs on your way to and from the apartment. Good location and beautiful view.
Sadly the Lisboa Festival was literally taking place just outside the apartment, which kept us awake most nights.
Alfama seems very quiet when the festival was not on, and during the daytime.
A tip would be to check with the hosts before booking, if there is anything going on in the neighbourhood.
Unfortunately, we had no prior warning about the festival from the hosts.