We stayed in 2 apartments on the 3rd and 4rth floors. Note that there isn't an elevator. So hauling up luggage will be an issue. Also the property is on a narrow, one way, single lane alley. If you have a car, like we did, it will be an issue. We parked overnight a mile away. Standing/parking a car by the apartment to load/unload is going to create a traffic jam, so be careful about that. No dryer in the apartment, only washer.
Elsa & Rui are very helpful and communicate promptly. Their property is practical, well stocked and clean. We had no issues and enjoyed our time in Lisbon. Many thanks to them! I recommend them