We had a nice time renting a room in Sara's appartment. Here I am going to list pros and cons:
+ location: close to the city center
+ Sara is a friendly host who will give you helpful tips about visiting Lisbon
+ the appartment was clean
+ it was warm in the appartment in December thanks to the heater, we could use the heater in our room
+ we could use tea and coffee, sometimes bread
+ good conditions for remote work: stable internet and desk
+ though Sara is very friendly, we did not feel like someone was interfering too much into our life - we apreciated it very much
- the heater that we used was gas-based, so sometimes you could smell the gass, however very rarely and the smell was very subtle
- the door to the bathroom is close to see-through so that created some discomfort
- we did not have the key to our room , however we did not ask for it and did not need it (leaving it here in case this is something you need to consider) - we never locked our room