I had the time of my life in Lisbon and sleeping at Tania's corzy place was definetily part of that. The freedom of having your own flat in walking distance to many cool places in Alfama and walking distance to the Metro station Santa Apolonia (blue line brings you to the commercial center and bairro Alto to have drinks at night).
Yes the place is small, but it wasn't a downside in any way, there is still everything you need in the kitchen and bathroom.
Communication was simple, I knew exactly how to find it (in the tiny, windy roads of Alfama) and how to open it. This particular neighborhood is pretty quiet as night as well, so I could sleep with open windows.