Awesome apartment, very cozy and stylish, clean and equipped with everything you need (including dish washer). The town center is just around the corner, and there are a number of good restaurants in the near.
It has a small disadvantage - a restaurant is directly below the apartment, and it is quite noisy till 22PM. Not a big deal though.
I definitely recommend it, I think I will try to get the same apartment next time I come to Sintra.