We had a fabulous three-night stay at Anna's place. The neighborhood is close to Santa Apolónia train station and the Alfama, and is very quiet and peaceful compared to other parts of the city. The apartment is gorgeous, even better than the photos, and has everything you need to be perfectly comfortable. The view is easily the best part! Anna was very responsive beforehand and helpfully answered all our questions. You really can't go wrong booking this apartment - we certainly will if we return to Lisbon in the future.
One last thing: Bring good walking shoes with you to Lisbon - the hills are crazy!