This was my second time staying in one of Manuela's & Herve's apartments, and again a great experience. One can only hope all hosts would be as nice as Manuela is :)
I really liked the apartment, the heating works well, and the interior design is done with good taste. The neighborhood is a bit far from the absolute center of Lisbon, but if you are remote-working like me, the location is completely fine. As mentioned by others, the only issue is a bit bad soundproofing because it's an old building. But besides that, very much recommended.