This place is a perfect staging for a Lisbon adventure, it has a beautiful park nearby, plenty of nearby shops and restaurants but I found the neighborhood to be relaxed and quiet, just far enough from all the crowded downtown areas but with a tram passing every 10 right on the front of the building that will take you to Alfama, Barrio Alto l, etc.
the apartment is very well appointed and the views from the rooftop terrace are spectacular.
really the one thing to note is that this is a penthouse on the 3rd floor and the stairs are narrow so try to not bring too much heavy luggage and you'll have a wonderful time.