Location is awesome! 5-10 min walking to the center.
Quiet place, surrounded by nature on one side and by a main street on the other one.
The studio is rather small. However, you probably won't spend much time inside, as Sintra is beautiful and there is so much to see, visit and learn!
The bed is great, as other reviewers mentioned.
Check-in was quick and convenient; since there is no reception in the building, one only needs the access codes to enter. So check in time may be as late as one wants, which for us was a big plus.