Staying at Anabela's place was super nice. She lives downstairs, so any communication is a staircase away. The apartment is very well decorated and clean, the kitchen is nice and the bathrooms (!) are both very clean and spacious enough for two grown ups.
The area (Graca) is maybe the best to stay at in entire Lisbon, as it's close to everything (besides Belem maybe) and the Tram stop is just up the street. The only downside is that the "master bedroom" is a bit noisy at night, when you sleep with open windows ... but as there is a second bedroom, you can just relocate there and things are good ;)