Filipe's apartment is great for a short stay in Sintra. It is not in the center of town but it is only a short 2-3 euro Uber ride away from the city so it is 100% worth it to not pay the expensive Sintra center prices. We had to share the space with other guests, but the apartment is plenty big enough to accommodate everyone comfortably so it was no problem at all for us. Filipe has lived in Sintra with his family for years so he knows the city well and gave us great recommendations.
Definitely worth a short stay to see all the sites in Sintra without having to rush and worry about trains back and forth to Lisbon.
Thanks again Filipe!