One of the best AirBnb experiences I had so far.
Also, one of the best AirBnb hosts I ever had. The host welcomes you by picking you up from the airport to travel to your AirBnb. During the car ride from the airport to the apartment, the host will point things out to you throughout the city and give you tips about what to see in Lisbon and how to get there. It was super informative and helped me further plan my trip. Before the trip, she was super communicative about me traveling to Lisbon as a lone traveler.
The apartment was clean and welcoming, not stark like others I've been to in the past. (The stairs are STEEP and narrow so just a heads up for people who deal with disabilities or carrying a large check-in bag.) The apartment is a small studio, but had everything I needed if I were to stay-in (you shouldn't be staying in though because the Alfama neighborhood had a lot of things for you to do to spend your time outside). The location was in the center of the neighborhood, but it was near a tram stop and a walkable distance if you wanted to travel to other central neighborhoods like Bairro Alto, Baixa, etc. During the night, I wasn't worried about walking around alone as a woman - it is quiet but pretty safe.
If I were to go back to Lisbon, I would definitely see if Maggie's AirBnbs were available again.