Everything was just perfect. The place is super duper clean, very central, only 2 mins away from the railway station and yet we slept like babies at night. Close restaurants (Bacalhau na vila is excellent), shops, cafés (the saudade café is a must-giant scones ☺️) tuktuk, places of interest…
For those who like to walk a lot, everything is easily accessible by foot.
We were 5 and though we spent the whole day out, we felt very comfortable when back in the appartment.
Communication was also very good from the beginning.
Cascais and Estoril are not very far from Sintra and lovely to visit. I strongly recommend the Grutas de Mira de Aire which is one and a half hour away from Sintra by car.