I lived in this studio for 3 months, so hopefully, I can provide insight to others wishing to make a long-term stay.
The hosts are wonderful. I made several changes before I arrived, all of which was made easy by them. I also extended my stay with zero hassle. Throughout the duration of my stay, if I had a request the hosts would answer and address the issues promptly.
The studio is as the pictures show. It was extremely clean on arrival, and is a nice and cosy apartment. It is ideal for 1-2 people. The kitchen is well equipped and I cooked in it daily. I definitely have a soft spot for this place, I got so used to it!
As for the internet / wifi - I was working online full time in the apartment over the course of my stay. Due to the rugged and hilly nature of parts of Alfama, the internet isn't quite as fast as other parts of Lisbon. The host supplied an ethernet cable, and I had no problems while using it. This includes for work, streaming, and using a cloud desktop.
The neighbourhood - Alfama. I would always say you should research a neighbourhood before visiting, but Alfama is a special case. It is tightly packed with narrow streets and many houses/apartments, and so it is noisy. I had visited Lisbon before, so I was aware of this. I enjoyed the sounds of daily life there, especially coming from the pandemic lockdown in the countryside! At night it generally quietens down, save for the occasional person or group walking by. And of course, there are the regular sounds of music - Fado, which I loved to hear. Due to its hilly nature, walking around Alfama can be a workout, which is something that should be kept in mind. I think the trip improved my cardiovascular health quite a bit!
The apartment is surrounded by decent amenities. There are a number of minimarkets that have daily essentials. There are good restaurants right by the apartment also. There are several laundrettes close by. A short walk up a hill, by a miradouro (viewpoint) is a regular stop for the 28E tram. This tram extends all over Lisbon, and makes trips to larger supermarkets, the gym etc very easy and quick.
Something I loved about the location was how walkable it is. A 10-15 minute walk will get you into the middle of Lisbons nightlife, with all the bars and nightclubs you could want. Furthermore, the nearby Museu do Fado servers as a landmark that you can easily make your way back to if you get lost in Lisbon - You just get close to the water, and walk east until you hit the Museum! Easy!
I really enjoyed my stay here, the host was great, the apartment was lovely, and the neighbourhood was something from a fairytale. If you want to stay in Lisbon and get planted deeply into the culture, I would strongly recommend this location!