We stayed in the rooftop apartment for four nights. Never had stayed in Principe Real before, but it's a great location - quiet, because it's off of the main street, yet close to all kinds of restaurants and the gardens and Miradouro. We loved the view and the terrace. The owner provided great suggestions for dining, etc. The apartment is airy and bright, clean and well-stocked. We'd be happy to stay there again next time we're in Lisbon.