Vera and Guy are great hosts; they gave us plenty of information about Sintra (places to eat, visit, and buy local pastry). The flat was in perfect condition, all clean and neat, including a nice welcome gift :)
The location is great since it's close to Sintra's train station, so you can go easily to sightsee the main places around the town (Palace of Pena, Quinta da Regaleira, Castelo dos Mouros).
We really enjoy our stay in this flat and hoping to visit again!