We visited Lisbon with my mother in April-May and stayed at Paula's and Cesar's air bnb apartment for a bit less than a week. We cannot emphasize how much we enjoyed and how amazing hosts Paula and Cesar were!!
The place is located ~10minutes walk from the gorgeous park Eduardo VII, close by are also bus stops and the metro. The neighborhood was safe and the streets quite calm.
The apartment is a newly renovated office space converted into an apartment/ loft. It is very modern with more than everything you need for cooking, a good night sleep, as well as a good internet connection. The apartment was very spacious and clean, and the bathroom modernly equipped. Everything worked well and we had absolutely no problems. As the apt is located in the basement in the summer time it is nice and cool, whereas in the winter time there is a very effective heater.
The area where the apt is located is on the flight route for landing planes and thus you can hear quite often the sound of airplanes. Nevertheless the sound of traffic was quite minimal compared to other areas.
Whenever we had some questions Cesar and Paula were always ready to help. We felt very welcome and can recommend staying at this place 150%!!