The apartment was really nice, mostly clean and minimalistic, but equipped with the most necessary things one needs for a medium-long stay (1.5 months for me). Bonus points for a capsule coffee machine, negative points for the water kettle not working... but besides that really well equipped.
The flat showed some minor signs of use, probably due to the "normal" Airbnb clients being not super-careful with everything, but nothing that reduced living quality.
The flat is located in the nice district of Belem and therefore it is no party place but rather quiet during the night hours. However, some major touristic places like Torre de Belem, Pasteis de Belem, or the Monastery Jeronimos are really close. Speaking about the rather quiet neighborhood, the flat itself can be rather noisy, depending on your Airbnb flat-neighbors, as the apartment was only divided from the neighboring apartment by a wooden door.
Overall a very nice stay and especially for a mid-term duration a good compromise of money-to-value.