Carla's place was really cute and right in the heart of Alfama which is the oldest part of Lisbon. Having a view of the river (both from the living space and sitting in the bed) was the best part!
We stayed for almost a month so really got the feeling of the area - it would be perfect for a short trip and is located in an excellent position for reaching most of the main the sights by walking.
Carla was a great host - easy to communicate with and made sure to help us with any problems - she even sent in a cleaner half way through our stay.