We were in Sintra for a wedding and Rita's place was the ideal place to stay. She met us when we arrived (we were a little late as we stubbornly decided to walk up the hill with our cases!) and gave us lots of great tips about Sintra during check-in. She also organised a taxi to bring us to the wedding the next day which was really helpful.
The Airbnb is also handy for visiting the Pena Palace and Moorish Castle as it's right near the ticket office and close to a stop for the 434 bus which does a loop around the town and some of the attractions.
We wish we'd had more time to explore Sintra and if we're back we'll definitely stay here again.