I was hosted by Tin's friend Zlatan. After some misunderstanding with message, they organise perfectly even if I come early (10AM).
The room is correct in an appart very high (6th floor without elevator). You have to understand that there are 3 or 4 rooms in this flat so you'll share bathroom, living room & kitchen with them (and the balcony with great great view).
Place is small but to visit Lisbon & sleep on quiet clean place is perfect.