The AirBnB is located in a small road (no cars allowed). Two restaurants are next to it, so people sitting outside and talking until ~ 10 PM. After that, it is quiet. The apartment is not as brightly lit as described on the pictures. It only has a few windows on on the entrance and no on the side. on the other side there is another door leading to the outdoor shower. In order to get fresh air into the Apartment you have to at least open one of the doors. Apart from that, the Apartment is nicely situated offering a (I assume) "typical Portuguese" living situation. You can walk to the majority of sights, however it might take you some time. This was not a problem for us. The kitchen has all the necessities.
The apartment all in all served us well in the four nights we were in Lisbon.