I liked this apartment. It was very sweet and very close to main attractions in Sintra. However, it is definitely not a ten minute walk to the castles. Its a short Uber ride away and makes for a lovely 40-50 minute hike. There are private trails you can hike to the Castle of Moors and Pena Palace, which were nice, but definitely not close walking wise. We liked the apartment, but we were on the ground floor so it didn't feel the most private. Check in was easy which was nice. We were also there when it was rainy, so we were at a loss of what to do with our night. Still a nice trip in the end.