Francisco is really kind, and gave us good advices on where to go and where to eat ( some really good pastries ^^)
The location, in a small village nearby, is nice and we were able to visit both the palaces and the city.
We had a great time in Sintra and the house is lovely.
Just the mattress is not so comfortable, maybe it could be changed, but it was ok for one night. There is also a nice pool and terrace.
I recommend it !