Mario's place is perfect. The apartment is beautiful with an excellent location in Bairro Alto, it's clean, comfortable and well equipped. I didn't meet Mario but he's been very friendly, helpful and quick to reply. Mario's friend met me at the apartment to give me the keys and show me around, and helped me organize a taxi for the airport. I only stayed for one night before leaving Portugal but I'll definitely stay there the next time I'm in Lisbon.