We had a pleasant stay and would totally recommend it! The hostel ist well located in a calm neighbourhood. It is good to reach with a car, such as all the sightseeing stuff in Sintra. You have everything you need there and you can book breakfast as well if you want.
We did not found the way to the hostel right away but Alberto was really helpful and guided us to the house. Furthermore I was ill and Alberto tried to find a doctor to help me get better, which was also really nice.
All in all a very nice place to spend some nights and discover Sintra.