Ana's flat is within the walls of Castelo Sao Jorge, and therefore it was a unique experience to stay there. The flat itself is cosy and clean, and we had a great stay.
Ana herself is very communicative and responds if there are any problems, and she left us some breakfast items for us to enjoy as well.
The thing that people need to be aware of about the flat is that it's on the top of Alfama district, so you will have to walk uphill - so probably not recommended to people who wouldn't like walking up the hill for 10-20 minutes to get to the flat every day.
Also, there are peacocks that roam around the area (from the castle) which is super cool, but beware that they can be very loud at night. After the first night, we kept being woken up, so we used earplugs and slept fine after, but if you're a light sleeper you may want to take this into consideration.
Overall, we had a lovely stay!