We had a great time in Sintra at Maria's place. She and her family are extremely kind and welcoming. We felt like home. We could use everything in the kitchen, she gave us advices, let us print, did the laundry for us and gave us a ride to the train station at the end of our stay. The rest of the family was also very kind, they directly offered us a beer and made sure that we felt comfortable.
The room was also nice and clean, with an own bathroom.
Sintra is a nice, but very touristy small town, yet we really liked our stay.
Two thumbs up!