You share the apartment with 2 other rooms, but in practice you'll hardly ever meet them: people tend to be in Lisbon for the city, not for their accommodation. That being said, it's a great place to stay. It's clean and comfortable, has a great shower, two toilets (so you'll never have to wait) and a fully equipped kitchen. The location is awesome. Just walk to the riverside (5 min) and take one of those electronic scooters to Cais do Sodré (another 5 min) and you're off to the races! I had a great stay, and I'm confident anyone reading this will too.