We had three beautiful days in Lisbon and enjoyed every single part of it.
The apartment is located on the hills next to the main part of Lisbon and therefore a good start to all districts and sights of the town. Perfect for couples if you eat out most of your stay.
If you come by car you should check on a local parking lot near by (ie. Graca district, 10€/day) since its in an area for residents only.