The apartment is really cute, in a very beautiful and very quiet street that tourist tours come to visit. It is just a few meters from Graca Square and Belvedere, a very nice area of Lisbon that still keeps normal cafes and restaurants and not tourist traps.
Everything worked well in the apartment and the host was super responsive and kind.
In terms of the negatives of this flat, no really relevant ones. The walls are thin so you can hear the neighbours and vice versa. There were no annoying neighbours so that was not a problem for me. Also, because the house is quiet, being on a very quiet street without traffic.
Definitely recommend this place.