Marta and Ines are wonderful people who have a wonderful apartment! It's quite near Cais do Sodre, but very quiet, so it makes sense if you're going out but isn't in the middle of it all like barrio alto. There is a trendy taco spot and a coffee shop a block away, and the timeout market is a mere 4 blocks; Chiado and downtown Lisbon are both an easy walk.
The views and airiness of the space are special, and the balcony is the perfect place to watch the sunset (and sunrise) over Lisbon. I loved the top floor bedroom, which is like a studio, and also the fantastic water pressure in the showers. We didn't have occasion to use the kitchen, but it's very nice and entirely set up so that one could entertain.
This is a great place to stay and one of those that make people love Airbnb.