We had a really great stay overall, the flat is small, but has everything you need. The space is small but clean, modern, and light, with a view of the nearby cathedral.
The location is absolutely perfect, as it's right in the heart of Alfama, with plenty of restaurants, live music bars, and sights nearby. It's also a short walk from the train station, which was hugely convenient for getting around.
The host was very communicative, and we had all questions answered before arriving.
The only real downside was the fact that the flat itself only has a sliding door that doesn't fully shut, so you can hear your neighbors extremely well (almost as if they're in the flat with you).
Overall, great value for money and I would definitely choose to stay there again!