Gisela is a very welcoming host. I do not give more details but she gave us the best welcoming gifts. She is very available and helped us a lot in our first time in Lisboa.
The flat is as described and really comfortable and in a really lovely area. We reached the alfama quarter and pracia di comercio by walk and it made nice walks. The tram 28 stop is at 1 minute by walk.
There is a really cut bar with a very welcoming staff in front of the building and a supermarket also: the flat of Gisela is really convenient to visit Lisboa.
Do not hesitate.. Go for it!!!