I have used AirBnb for over 10 years, and this is by far the best experience I have ever had. If you are thinking of staying in Lisbon, this is by far your best option. Where do I start? We arrived to a beautiful welcome from the nicest host we have ever had. She spent so much time explaining where to go in Lisbon and had gone to the trouble of getting us wine and local food.
The apartment is spacious, spotlessly clean, in a beautiful quiet area, with an incredible view that really makes it spectacular. The location is perfect, as you are near Barrio Alto etc, but away from noise and piles of tourists. You are also very near Jardim do Torel which is a lovely view over the city. There are three cafes directly below the apartment and two supermarkets, so you can live extremely easy.
Airbnb can be a mixed experience, Claudia really typifies what makes it special. She could not make more effort to make you feel welcome and part of her wonderful city. I could not recommend her apartment more. My wife and I loved it.