We had a great stay! The flat was spacious, in a great location, clean, and the hosts were great at communicating. The apartment was 20 meters from the taxis and metro station.
There was a great popup market with local vendors right in the square in front of the apartment and a grocery market right around the corner. Praça da Figueira is the perfect homebase to explore Lisbon.
The beds are not the most comfortable and there is a sewage smell at times (which is quite common with the old pipes in Lisbon). Neither of these things would keep us from staying at the flat again, just things to note.