Roberts flat is a great starting point to "conquer" the hills of Lisbon. The flat is situated in a quiet street and in walking distance to Barrio Alto and city centre. The interior is stylish and clean. The only downside of the flat is its struggle with humidity. Despite carefully renovated, I assume that many flats in old Lisbon struggle with that kind of problem.
Nevertheless we had a great stay and would recommend this flat for a short term stay.