Anna and Ricardo's place is very cute and central for the Alfama area (just below the the National Pantheon).
The rooftop is great for breakfast and sundowners.
They are great hosts and were very quick in responding to questions about getting to the apartment and other questions about Lisbon.
My husband is quite tall, and could not really stand up straight in the bedroom and bathroom, so South Africans, Australians, Dutch and other tall nations should be careful. (I'm about 1.76m tall, and could just about fit).