Nice new flat with all you need for your stay. Spacious, clean, well equiped and a nice attention with a bottle of local wine. Good tips from Helder for your trip. Just the flight passing over the area could be a bit noisy but its quiet a common problem in Lisboa.
you can walk to Belem attraction (20mn) and even to the center for those who are not afraid to walk more. LX Factory is 5mn from the flat.