It's like a hostel, but full of single bedrooms only. There were enough shower rooms given the number of rooms. The whole flat was cosy and comfortable. It's located in city centre and between two different train stations.
The host, Celso, was so accommodating and helpful. Despite my late check-in (around 930pm), he was available to explain the details in the house and sharing tips on attractions to go. There was a day when the hot water was down at 10pm and so I texted him for help, he did not hesitate and dropped by to fix it within seconds.
I had an amazing time in Lisbon! Thank you, Celso!