We loved the location it was very central and one could easily explore Lisbon. We were disappointed however regarding the bathroom situation. There was only one bathroom housing both a toilet and shower which was shared between 8 rooms (+-16 people) so you can imagine how difficult it was to find a gap in the mornings or evenings for using these facilities.
The castle view room itself was clean and beautiful but it is situated right next to the communal kitchen with a thin door separating it. We struggled to sleep at night having the other guests come home late and use the kitchen.
One last note. We would suggest replacing the mattress as it was super thin and uncomfortable.