The more we explored Lisbon, the more we realised what a perfect location the flat is in. You can walk everywhere within 25 minutes but it also has the metro close by for the airport. Nice and quiet and lots of restaurants nearby. The Alegria park has a nice kiosk and live music at the weekend. We spent a lot of time around Praca das Flores which is about 12 minutes away.
The only downside was that the main bedroom has a locked door leading to the hallway and you can hear everyone coming and going. It's part of being in an old building but it was slightly distracting.