It is a very nice apartment in the heart of Lisbon. We loved creaky floors, the balcony, the overall atmosphere of the place. Some guests complain about neighbours noise etc, we actually liked it :) Its just what you get in this area of Lisbon. We are a couple in 30s-early 40s with 5yo kid.
What could be improved is kitchen equipment being really rudimentary and the cleanliness here and there could be improved. Nevertheless, we feel it was a very good stay.
Please keep in mind the flat is at the 3rd floor, there is no lift and the stairs are very steep.