We stayed for 3 nights in the Surfgasm guesthouse and were enchanted by the place, it's location and hosts' friendliness. Paolo was very responsive and welcoming and also made a great tour around the city showing the most significant places and telling many interesting facts about the history of Lisbon. The room itself is good, there is heater and the bad is equiped with heating blanket which is really important in winter and cold spring. And the rooftop and balcony and cozy living room make you just feel happy, relaxed and lucky.
All the above is worth climbing the 6th floor up :)