I would definitely recommend this apartment. It is located in a quiet street in a beautiful neighborhood of the historic center of Lisbon, within a walking distance from lots of sights, museums, restaurants, shops etc. Moreover, it is super clean.
Joana was very very helpful. Didn't have a problem waiting to let us in at 1:00 am, responded immediately to all our questions, even suggested a friend of hers to us to give us advice about local surf schools!