It was the perfect place to be since it was close to everything. At our doorsteps were places to eat and a great coffee shop at the corner (Pertola). The apartment was perfect for two couples; the bedrooms were private. The building is also secure and the locked box was great. You don’t have to carry a key around and worry about losing it.
My only recommendation is that if you’re coming in very early (before 10am) it is worth your while to rent an extra day. Lisbon is a very hilly with tiled streets which makes it difficult to pull your suitcases to kill time.