My husband and I were in Sintra for two days as part of our honeymoon in Portugal. We really loved staying at Filipe & Vera's Five House. Filipe was really communicative leading up to our arrival, confirming when we'd be at the house. After a short walk from the train station, Filipe welcomed us, brought us to our beautiful (and very clean!) room and immediately gave us tons of recommendations for things to do and see around Sintra. He also offered us tips that came in handy when trying to avoid the heavily crowded entrances to some of the sites in Sintra. We took his recommendations to hike between some of the castles and palaces and it was definitely a highlight of our time in Portugal. We experienced stunning views, steep climbs, and beautiful gardens!
A huge bonus for us was the breakfast they provided. This helped fuel a full day of hiking and exploring Sintra. It was also really sweet sitting around the table in the morning chatting with folks from all over the world. On the day we left, we had a flight at about 22:30 that evening, and Filipe and Vera had no problem with us leaving our bags at the Five House and using the showers after our day of hiking (and technically after we had checked out). I wish we could have spent more time there. I highly recommend the Five House!