We only stayed 2 nights in the apartment and it was generally not bad. In the Netherlands we are also used to the steep and tight stairs. The ceiling on the roof floor is low, but just high enough for us. View from the windows is on the church square, it's just for you. Mattresses on the double bed were not comfortable. Kitchen is ok. What really bothered is the smell from the shower drain. But we almost walked the whole day in Lisbon, so we could still spend those two days well. If the host will do something about the bad smell it will be a much better apartment to stay in.