The apartment is nice and clean and the location is very good. Sergio himself is a nice and communicative person and we had no problem communicating with him.
The problematic person is the person who is managing the listing, ms Alice who brings negative energy and unacceptable behaviour to the place. She has been rude with my girlfriend plenty of times touching her private stuff without asking permission. She does not speak English and forces people to talk Portuguese with her, causing a lot of confusion.
The worst thing she did was calling police to the flat because she lost somewhere her phone while cleaning the apartment. She opened a case against my girlfriend without proving anything to her what is something ridiculous to do as airbnb manager, especially as the phone wasn't of much value. Plenty of times we heard her talking about the guests of the apartment, in Portuguese, in an offensive and vulgar way. I doubt she's an educated and mentally capable to receive foreign people in Lisbon