The apartment was very nice and had a lovely atmosphere. The palace is just around the corner, but the street is nice and quiet.
Communication was very easy and clear. Teresa was super helpful and gave us tips for activities, restaurants and beaches. We felt very welcome.

Keep in mind that driving to the historical centre is allowed only before 8 or after 19 o'clock. We left our car outside the historical centre to give us flexibility to move around.
I highly recommend this place if you want to explore Sintra and immerse in the magical atmosphere of the historical city centre.