Carlo's apartment is a very nice place to stay if you want to visit Lisbon. It has very nice connections all around, metro, trams, bus at 2 minutes walk from the apartment and you can reach the old city center by foot in 10-15 minutes. Downstairs I recommend also the Tapas do Atlantico place to eat and get a coffee, the best coffee and Pastel de Nata we eat in all Portugal. Thanks again for a pleasant stay !