Rui 's apartment was perfect and very comfortable! If you can make it up the four flights of stairs you are in the best spot in Lisbon =)
Must visit Castelo de St. Jorge just up the steps behind the apartment with panoramic views. Also, if you have a free day and are willing to hike about, you MUST visit Sinta! The palace, castle, gardens and lakes are spectacular. Thanks Rui, Chau!