It would be difficult to find a better location than this if you like to be in the throbbing heart of the city. Easy walking distance to most areas, and very central, with about an 8 minute walk to the main shopping area of town.
The apartment is on the ground floor in an old part of the city, and although there is a lot of nightlife in this area of town, it is very quiet at night, and we felt very safe at all times. The apartment is perfect for two people, with everything needed for a pleasant stay.
Our host Nuno could not have been more helpful. He met us at the apartment in the evening to give us the keys, show us the place, and to offer some tips on where to go. His advice truly enhanced our experience. Nuno gave us details on how to get to the apartment from the airport, and my advice would be to also ask Nuno which streets to walk from the metro to his apartment. Although it wasn't too difficult to walk, we later discovered a much easier way without help from Google Maps.
We would like to stay at this apartment again when we next return to Lisbon, and we would have no hesitation in recommending this place to others.