We have been in the apartment for 6 weeks starting beginning of February and we enjoyed our stay a lot.
The apartment is beautiful and has a lot of natural light, the pictures from Airbnb are accurate. It has two balconies where we enjoyed the sun and the view.
The place is well equipped with cutlery, dishwasher, washing machine etc. It has also generous and well compartmented storage space.
Metro and train are passing close by, so for light sleepers, ear plugs could be useful. However, my husband is a light sleeper and he had no issues beyond first night, he got used to it (without ear plugs).
During our stay, the temperature inside the apartment was low. So we used warmer clothes and air conditioning to heat up the place. Taking an extra warm layer with you to wear inside the apartment is a good idea for colder months.
My husband worked from home during our stay. The wifi signal is good in the living room and suitable for work from home. In the bedroom (at least in the one with 1 big bed) the signal is poor, I had to pay attention to this because it would often switch my phone from wifi to my carrier.
The apartment building is nice and safe, it has a guard 24/7. There is also an underground parking place which was useful when we rented a car. It is also close to 2 metro stations (~10min). We could reach central area or train station in 30 minutes or less.
The location of the apartment was very convenient for us. It was a very pleasant surprise to see that the building is right next to a beautiful park. On the map one can see only Bela Vista as being closest, but actually there is a park that starts on the other side of the street and that one is connected to Bela Vista. So it was a very nice place for long walks or running in the two (hilly) parks, which I often did. The closest park has a training area with outdoor gym equipment. It can be found on maps by the name "Calisthenics park and Street workout".
The owner was nice and helpful every time we had a question or request.
The owner also rented us bikes which was very fun and useful because there are bike lanes that start in the park next to the building until central areas. The city is hilly, so we had to use our legs, especially on the way back :)
We would like to come back to Lisbon and rent the same apartment, for us was a really lovely place.