We loved staying in Joanna's AirBnB. The location couldn't have been better. It's a short walk to all the main attractions in Lisbon, and there are lovely cafes and restaurants just outside the door (check out Flora and Fauna, Heim cafe, and Restaurante Armazém Da Cachaça).
We stayed for a month and a half, and the apartment was great. The internet is good enough for video chat and working regularly (though the internet isn't strong in the main bedroom). The shower has good water pressure, and there is enough hot water. The kitchen is a bit small, though it's definitely usable. The auto-brewing coffee machine was appreciated! You can hear a good bit of street noise in the living room. Often this is very enjoyable (the random voices of friends talking, school children being led on an outing, a random guy playing flute, etc) though there's also noise from cars since the street is narrow and the sound reverberates. Keeping the windows closed really helps. The bedrooms are quiet, though light sleepers may want to wear ear plugs because you can hear people on the other floors.
The only area that could be improved is how cozy it is. It would have been nice to have softer pillows and fluffier blankets on the bed (like a light down duvet).
We would stay here again without hesitation. The location can't be beat: the energy of Lisbon is just a step outside the door. Joanna is a wonderful host, incredibly responsive, and she has great tips about what to see and how to get around!