The flat is situated just a minute away from Martim Moniz metro station right in center of Lisbon. You can walk from here to almost every famous place in old town, no need to use public transport. Supermarkets and Padaria Portuguesa are very close.
Neighborhood is multicultural a lot of Chinese, Pakistani and Vietnamese shops and restaurants. House is situated on a narrow street with one way traffic. We slept well, but we could hear every conversation on the street during the evening.
Only downside are pickpockets. They walk behind you then you're climbing the steep streets, so hold your backpack in front of you. I was lucky and only lost my first aid kit form back pocket of my backpack. So beware.
All In all it was a nice stay.