The house is huge. Very comfortable and easily accessible from the center (10 mins walk or if you take the funicular it is easier).
The area is Barrio Alto, which means lots of bars and restaurants and people can be loud until early hours, especially on Friday and Saturday. But it has its perks, like proximity to lots of restaurants and bars. It suited us as we were out all day and after coming back, we had restaurants to eat 30 seconds away (and there are some great ones around the corner or even on the same street).
The team is attentive and responsive. We had a small issue that was dealt with immediately.
The city is great, Sintra is great and the flat helped with having a fantastic time.