We had a great stay in Gerard's place, Ana and Rui are very attentive hosts. Location is perfect for exploring Lisbon if you really want to feel its soul, every evening you can hear sounds of fado and delicious smells of portuguese cuisine. Apartment itself is very small. but very cozy and comfortable.
Alfama is an old district with no cars allowed so you will need some extra directions from the host on how to get to the building (our taxi driver got lost :D). All in all great experience for a very reasonable price, can recommend!