I will suggest this small and cosy hostel to everyone wants to come in Lisbon!
I was in a 6 bed room, nice and warm, private locker under the bed, 2 large doorwindows with pass for the terrace and it was amazing, quiet people, polite from all over Europe. You'll make lots of friends too if u wish! I never felt cold in it (winter time), and if you will there are lots of blankets u can use for free.
The hostel has a private big terrace, I loved it, amazing panorama as well. Good breakfast, they could cook eggs for you as well. Very friendly staff, the owner a very beautiful person.
The hostel is located very close to the Castel in Alfama, so if you are example Martim Moniz, you need to get some stairs (almost 300) to get there, but you can trust me, it will worth it for sure ;) otherwise you could catch a tram or elettric scooter. The location is amazing, I'll come back here for sure! Muito Obrigado guys! Ciaooo