To start with our conclusion: Unfortunately, we cannot recommend staying in this apartment - at least in winters. The review is based on five nights in January by a couple.
According to Filipa, the apartment was newly renovated and looks modern. However,
... there is just one window on normal height (I. E. in the bedroom). Since it is on ground floor with tourists passing by you don't really wanna open the shatters.
... the bathroom is an annex with no door. This means the rest of the apartment can hear all your noises as well as you are basically taking a shower outside. The construction with windows on the height of approx. 2 meters reminds of a winter garden but with hardly any circulation. That causes the smell of moist and a humid feel in the entire apartment. Hence, in January it was freaking cold. The provided little heater didn't help.
... the bed is a simple camping or guest bed with a thin and soft mattress. After two nights our backs weren't happy. Due to both the cold and humidity the bed felt wet.
... the kitchen has some amenities. Other than indicated in the photos there was nothing provided to make coffee. Also basics such as tea, oil, etc we had to buy new. Good thing is you get your galao for 1.50e around the corner.
Lastly, the location is very nice and quiet. Graça is a beautiful neighborhood, one of the miradouros is around the corner and the famous electrico #28 passes through. It is a good starting point to explore Lisboa. Also, Filipa tried to help and has always been easy to communicate with.