As described - this place is very very special. Very creative, by a creative host :) Location is amazing - in the heart of Lisbon center and pretty calm. If you come by car - it is a bit complex driving up the narrow street, but with the clear instructions of the host - no problem. In terms of parking - near the house only possible anytime outside business hours, as it is when inspector might come to check if all cars belong to residents. There are some parking solutions nearby, which was Ok for us, and it worked great. If you need to do a proper shopping for food - you might need to take a taxi so some shopping mall and come back, as we could not see a bigger shop nearby.
Apartment has 2 floors. Special place to stay, indeed. What we smelled was the smoke. I assume during winter the hosts were smoking inside, and since we are sensitive to that smell, we could feel it in most of the apartment. Hopefully the smell of the smoke will air out by the summer and future guests will feel Ok.