When I booked the flat, I didn't know that it's on the best place of the city. Everything is near on foot too. The apartman is perfect for a week for 2 people. Kind surprises were waiting for us. The communication was fine, Tania gave us perfect briefing.
Yes, the stairs are narrow and high. But don't forget, you are in the most beautiful part of Lisbon, and every house is like this :-)