We had a good time at Olga's house. I was the lucky one to take the big dormitory with this amazing view that you could see in the photos. I would say it is the big asset of this place, you couldn't find a "more on the beach" house than this. Also, there is a great place next door where you can eat amazing seafood.
As for bad points: it is a mold smell in the house and things are a little rusty, but I can understand this because of the location. Also, it is a 45 min ride by car if you wanna reach Lisbon city center and much colder than in other parts (again, right on the beach!). There is a table for 6 pers but in the big dormitory, so not really a space to gather around and discuss.
I thank Olga for the experience and for the fact that she could check us in earlier.