Nuno' apartment is a great base for exploring Lisbon. It is super clean, comfortable and cozy. We really appreciated the complementary car service from the airport as we arrived early in the morning after a long flight. We were greeted at the apartment by Nuno's brother Rui who explained how things worked in the apartment and gave us great tips on shopping and eating in the nearby area.
The apartment is conveniently located within walking distance of major sites. The only negative is there is a bit of a steep hill to navigate to reach the apartment. However, the hill isn't any worst than many other you will encounter in Lisbon.
We would definitely stay at Nuno's apartment if we return to Lisbon in the future.