You cannot appreciate how close this is to most of the sites you want to see in historic Lisbon. The write up kind of says that but wow, we walked or accessed public transportation all four days and it was so easy because of how central the location was.
The other great thing was just walking the various roads surrounding the flat and finding great outdoor restaurants. We never had a bad meal within a 10 minute walk.
Lisbon is a great experience and this location makes it convenient to enjoy.