Very nice apartment and easy for discovering the city. Nice breakfast stops closeby and also lots of the touristy things one once to see, when in Lisbon for the first time. Public transportion close by.
Very easy check in and out and communication. And the little rooftop is a nice gimmick for a first view of lisbon!
If you have troubles with walking then Lisbon must be tricky anyway, but since the house has some steep steps, this maybe wouldn‘t be the best spot. Also big luggage might be difficult to get through the main door.
For lovers of firm mattress to sleep: The mattress is rather soft, so lovers of soft mattress, this is a dream come trough. Lots of covers and good pillows!