We (family travelling with 2 children) had a great stay in this apartment. The apartment is extremely functional. The view is amazing with the sunset over Lisbon and it is extremely well situated. It is very close to the castle (so on top), but you simply need to start by identifying the 2 main elevators taking you up and down (one near Pingo Doce and the other one on the main road (to the left) when you exist Pingo Doce). The elevators close around 21-22, but this was not an issue for us, as we are travelling with small children. The elevators were very practical to get around smoothly from one neighborhood to another during the unusual heatwave (42 degrees) during our stay (with stroller).
Daniel was very nice and attentive and arranged for a baby bed for our youngest daughter and let us leave our luggage until 16:00 on our departure as we had a late flight, this was really appreciated. We would for sure recommend the apartment, mostly because of its central location and its amazing view (and natural low temperature during heatwaves).
PS: Take a taxi to get there, it is so impressive to see how the cars are getting around in the hills of Lisbon (and you avoid carrying your luggage to the top of Lisbon : )