The apartment was lovely and suited our young family very well. The wireless router wasn’t working when we arrived but the hosts replaced it within 24 hours.
It’s easy to get to central Lisbon and other places from the nearby Metro station and there were lots of shops and cafes nearby.
But be aware the apartment is VERY close to the airport and the noise from the planes is VERY loud. It was ok with the windows closed but there is no air conditioning, so if it was hot you’d want to open them and so you’d have to put up with conversation-stopping airplane roars every few minutes.
This wasn’t a real problem for us as we were only there for a short time and mostly sightseeing in the day. And if you wanted to be close to the airport for convenience, you couldn’t be much closer.