The appartment is quite nice, accessible using public transport, out of city center and close to the LX Factory which is a very trendy place to stay at. The train station called Alcantara is very closed to the flat and enables you to join city center or Belem on a very easy way. You can buy things to eat at the supermarket which is very closed.
On Saturdays, it is a very crowded busy place: we could not sleep for all night. Planes are very noisy too : resting on the terrace is a challenge. I would say this appartment is perfect for young people enjoying night life.
Moreover, concerning the taxi transfer to the airport, it costed us 12e with regular services and 30e with the transfer proposed by the flat renter.