Sandra's place is located in Mouraria, a very colourful part of the city with nice coffee places and bars and two viewpoints are in walking distance! We didn't have to use the publice transportation a lot, from the apartment's location you can reach Alfama (the Castle), Baixa, Chiado, Principe Real, Bairro Alto...just bring some comfortable shoes :)
The apartment is clean, you can find everything you need (there are also two supermarkets very close), the balcony is a beautiful spot to have your breakfast or enjoy dinner and Sandra is a very helpful host.
We definatley recommend staying at this place! :)