This is a flat managed by a company, not the owner. The flat is small but super clean and nicely decorated. It fits four people without any problems.
It's located at the back of the Council building, within walking distance of Ribeira, Rua de Santa Catarina and Praça da República. The road is busy during the day so some noise is expected if the windows are open. The cafe next door to the building offers good (and tasty) options for breakfast or lunch.