Maria is really nice and flexible - our plane has delayed, but she took the keys to us in the middle of the night and still showed everything in the apartment! The apartment is well equipped. Everything was cosy and clean.
To not surprize as we did, the area of the house doesn't seem the safest one at first sight, but everything was fine.
The metro and the train station is 5 minutes of walk away, you can reach Sintra and the city center without any issues.
The apartment is in a tall building, and you can hear a lot of neighbours and the elevator, so I recommend to not to forget the earplugs at home for a better sleep.
All in all, everything was fine, I recommend to stay here!