We stayed in the apartment for four days, 3 adults and one baby.
Felipe was very good host, who responded very quickly. We never met in person, but a lady Ines met us to let us into the apartment.
Apartment is very comfortable and most importantly has both ceiling fans and floor fans that you can use to cool down the apartment on the warm summer days.
Graca neighbourhood is a working class neighbourhood, well located close to the city center. Public transit is nearby, just keep in mind that it is a 10 minute walk up the hill to get to the apartment from the metro station. Nearby is also a Lidl supermarket which has most groceries required.
One minor negative aspect is that we had a car and it was not too easy to find parking on the street. Parking is free, but it is a very dense neighbourhood so you have to circle for a bit until you find a parking spot.
We would definitely stay here again.