The pictures and description describe very well Luis place. The flat was spotless and lovely. Luis even left a bottle of red wine for us, very thoughtful.
It is near Castelo Sao Jorge and Alfama neighbourhood and very close to Santa Apolonia train station what helps in terms of transportation. On Saturday's there is Feira da Ladra (a giant boot-sale type thing) very close I would definitely recommend a visit.
We walked everywhere we wanted to go, however it gets a bit steep in some areas.
I would definitely return to this flat.