The flat is super lovely with a perfect location in the center. There's no essentials so make sure to bring some, or there's a local supermarket about 2 mins walk. The flat is right next to a metro station, and one of the big train centers (which takes you directly to Sintra if you wish to visit)
Highlights include the amazing shower, and the view. The flat can get a bit hot but thats not a biggie. There is a nespresso machine.
Id definately suggest this place for my friends to stay in.