The house is very nice and located in a great building on one of the main streets of lisbon. The only thing that can put some people off is the 24/7 junkies that you see from the balcony.
We never felt unsafe and there is no shouting or fighting. They are far from the main entrance and do their drugs pretty quietly so if you are not an old couple or travelling with babies you probably won't mind. Seeing them gives you a sense of gratitude about your life.
Score: 10/10