Maria's place is perfectly located in the heart of Bairro Alto, from where is it really easy to go just about anywhere in the city.
My favorite part was how quiet the bedroom is. Also, once you close the window shutters, the room is basically pitch black, which is really nice. To top it off, the bed was really comfortable. (Needless to say, I slept in every day.)
Maria had a few guidebooks available with hand-picked recommendations which were really great.