It's a nice and bright apartment in the center of Lisbon.
We stayed for a week and had good access to public transportation and were even able to walk all the way downtown in about 30 minutes, via the Av. da Liberdade. This granted us the chance to pass by a lot of confectionerys, where we bought and proceeded to eat a lot of tasty Pastéis de Nata.
We can certainly recommend booking your stay with Nuno.