My boyfriend and me stayed at Anna Maria's flat for 5 nights and we really had a great time there. The flat was clean and everything was comfortable and nothing was missed.
The flat is about 20 min by tram apart from the center baixa - the stop is approx. 300 m - so it is very easy to go there.
I think the flat is perfect for people who wants to visit the city as well as having some moments for relaxing (the garden is brilliant for this).