This place is probably the cleanest AirBnB I've every visited. Everything was in extremely good condition (evidently it's still a very new place), the place is in a quiet side-street (although I can't judge the street-facing bedroom as we only used the back one, but the street was not very busy, even during the day). We (2 people) used this place to work remotely: the internet was good, there is a very small work room where you can close the door, and there's enough desks and chairs to accomodate for 2-3 working people.
Like almost everywhere in Lisbon you have steep stairs to get to the place (which wasn't a problem for us). And, also like everywhere it seems, you can hear the neighbors quite well, but they aren't too noisy and also only audible in normal times (not at night, at least for the 2 nights that we were there). All in all a very pleasant stay. Camila also came personally to welcome us and show us around the apartment and was very responsive to messages.
Thank you!