It was a great stay at Manuela & Helder 's apartment!
The apartment is very clean, with comfortable beds and everything you need during your stay. The location is also very good, very near to a metro station. (But I recommend everyone to use Uber in Lisbon, it's very popular and costs even less than public transportation if you have a team of 3 to 4 persons.)
The communication with Manuela went also very well.
Highly recommended!