Nice and cozy apartment near the center. It takes about 15 minutes to walk to the Alfama district. Since flat is located on the 7th floor and building is on the top of the hill you receive truly stunning view to the red roofs of the heart of Lisboa. Some supermarkets including LIDL are near.
Also, you can leave luggage in the storage for free if you already checked out.
The street is quiet, nothing will disturb you at night (we stayed in Bairro Alto before and it is really uncomparable)
Uber to the airport is just ~7 EUR