My experience staying at Diogo's was perfect! I absolutely recommend staying here. I'm already looking forward to coming back to Lisbon some time. :)
Not only was Diogo incredibly friendly and welcoming with fantastic local tips/recommendations, but the apartment itself was ideal - super clean and in a really great location at the edge of Bairro Alto.
Just one example of Diogo's wonderful hospitality: When I first arrived he sat down with me for an hour going over a map of Lisbon and a stack of nearby restaurants' cards to help orient me and give me helpful suggestions.